I just feel like it would be near impossible for them to retain control over areas in the other side of the pacific I could see a Martine trade start but after that it would be hard and the only way for the Haida to stay together would probably to just have them a devolp agriculture so that tribes didn’t have more incentive to break apart b have them get work crop that could grow well in the Pacific Northwest c both have them develop agriculture and get tech and crops from the olds world and then finnaly get cut off just because of the sheer distance but they could start establishing river cities and coastal cities up and down their homer region eventually starting to have civ of other tribes adopt and do the same thing
They don't have to though. Even if this empire did break apart at a later stage, or if it never exists at all, the important thing would be establishing this trade route in the first place. Here's a map of the trade networks of the Old World:
So, what we're doing is essentially extending the Japanese branch of the Maritime Silk Route, via Hokkaido, the Kuril Islands and the Aleutian Islands, across to the Pacific North-West. And via the trade route, you'd get cultural and genetic exchanges with East Asia, especially Japan and Korea, uplifting the Pacific North-Westerners to a higher tier of civilization, in much the same manner that the extension of the Maritime Silk Route to Japan via the Korean Peninsula uplifted the Japanese through cultural and genetic exchanges. Because really, if you compare the level that the Pacific Northwesterners were at with that of the Japanese during the Final Jōmon period, there isn't much difference between them. This semi-sedentary culture led to important population increases, so that the Jōmon exhibit some of the highest densities known for foraging populations. Genetic mapping studies by Cavalli-Sforza have shown a pattern of genetic expansion from the area of the Sea of Japan towards the rest of eastern Asia. This appears as the third most important genetic movement in Eastern Asia (after the "Great expansion" from the African continent, and a second expansion from the area of Northern Siberia), which suggests geographical expansion during the early Jōmon period. These studies also suggest that the Jōmon demographic expansion may have reached America along a path following the Pacific coast.
So this isn't a matter of distance, or a stab in the dark. This actually happened IOTL- the natives of the Pacific Northwest already have significant admixture with the Jōmon Japanese, one of the key reasons why they suffered a lower death rate from the Old World diseases introduced by the European colonials than any other Native Americans. But this expansion, the 'Jōmon Exchange', happened too early on IOTL, and ended too soon, for any of the technological, agricultural and social developments which Japan picked up later on in the Yayoi period to make it across to the Pacific Northwest. By establishing the trade route to the Americas, via this route, as a natural extension of the Japanese branch (and thereby adding the Pacific Northwest's massive deposits of silver, gold and jade as trade commodities to the Old World, thus making this branch far more lucrative and greatly enriching the Pacific Northeast as well) you'd remedy this situation, and allow them to replicate the transition which Japanese civilisation managed to make courtesy of the trade route, from the equivalent of the Jōmon era to their own equivalent of the Yayoi period. This would include transitioning from a hunter-gatherer society courtesy of the introduction of an irrigated, wet-rice culture from Korea and Japan, via the Kuril and Aleutian Islands, into the Pacific Northwest. The shift from a hunter-gatherer to an agricultural diet on the islands, with the introduction of wet-rice agriculture, led to the development and growth of a sedentary, agrarian society in Japan, and in the rapid increase in population, from roughly 75K people in the late Jōmon period to over 1.5M people by the end of the Yayoi period, and to over 4M people by the end of the following Kofun period.
For comparison, the Northwest Coast American Indians had a native population of about 250,000, with a near-identical hunter-gatherer culture of clans (likely no coincidence, given the prehistoric Jōmon expansion into the Pacific Northwest), that reached a considerable degree of sedentism and cultural complexity, to that of late Jōmon period Japan, and those of the Satsumon, Okhotsk and Ainu. In essence, the historical native population of the Pacific Northwest, pre-contact, was roughly four times the pre-contact native population of the Japanese archipelago, with a near-identical society and civilization level. So, the same transition could realistically increase the population of the Pacific Northwest by a similar margin in a similar space of time; a twenty-fold increase to roughly 5M people, over the course of the next 600 years or so. Along with the same transition to the Iron Age, with the introduction of metallurgy. Even if the Pacific Northwest remains a land of hundreds of scattered tribal communities and statelets at that stage, with frequent conflicts between them and a society characterized by violent struggles, it'd still be no different to the status quo in Japan as the same stage in its own history, 2-300 years earlier. And by the time the Europeans were scheduled to arrive, circa the 1700's, you could easily have at least two or three Japan-analogues, similarly or only slightly less advanced than Japan courtesy of the cultural and technological exchanges provided by the maintaining of the Maritime Trade Route having kept them up to speed with the Japanese, with the total population of the Pacific Northwest easily standing at 50-65M; or, to put that into perspective, roughly twice that of contemporary Japan, and 8% of the world population, comparable to those of the Spanish, French and Holy Roman Empires combined.