Complete reversal would ignore the real economic motives for the rise of the Occident vis-a-vis the Dar al-Islam/Iranosphere, Indosphere, and Sinosphere.
China was rich enough to not need to explore. When dealing with the huge Pacific, that lack of economic incentive is going to retard any push there might be by elites to go send men into what is literally the unknown.
Europe had a number of things going for it. For one, proximity to the New World -- and all the attendant benefits of the minerals, lands, and epidemic slaughter thereof. Secondly, the Iberians who spearheaded all this had built off of Muslim technology and had further innovated on ship design and navigation. Thirdly, they had the economic incentives to explore.
Europe, via the Dar al-Islam, had had access to goods from farther East, but had never had great access to the markets of Asia. Middlemen hiked up prices, and Western Europe was far away from the Eastern Mediterranean. This resource-penury was enough to motivate men like Prince Henry the Navigator to send multiple expeditions into the Atlantic void to try and find trade routes to Asia. It cannot be overstated what a gamble this was -- they had little idea of what lay ahead, and expeditions cost both money and, in case of failure, experienced sailors and explorers.
The Indian Ocean and Sinosphere networks didn't need exploration to the West -- they had all the trade they needed already, within one wider network. From slaves and ivory to spices and anything else, the wider East African-Indian-Chinese economic network was well-supplied. It's not as if the Occident had anything to offer anyway, other than slaves for the Muslim states to kidnap.
I do think a butterflying of Islam would change a lot of this -- but only insofar as the Christians might have better access to the Red Sea and Indian Ocean via the Byzantines. Without Islam, of course, Europe proper would be even farther behind tech-wise, even more of a backwater than they were IOTL. (My theory is that Islam's collection of European and Indian knowledge, and improvements on that knowledge, provided the foundation for Europe's later flurry of scientific and material advancements. It's no mistake that the Iberians were the first great explorers)