Maybe. Persuade me what advantages the Spanish have, however.
They might win victories; they probably would. But I don't see any way they could hold onto a more advanced MesoAmerica long term in the faced of determined resistance.
Persuade me what advantages China has, except for having introduced smallpox and other diseases among the population before the Spanish arrive in force. Which, to me, isn't much of an advantage.
Does China have a military tradition and expertise to match Spain, arguably the strongest military power in the western world?
how much of New Spain was England and Sweden able to wrest from Spain in OTL?
Short answer? Not much, and only the poorest northern fringes.
Spain was interested where the wealth was easily exploitable, which was in Central and South America. Until its decline much
much later, Spain commanded from Florida to the South. The British colonies from Canada to the Carolinas were rather poor compared to further South.
Later, Spain lost more. But that was later, and this is now.
why would Spain have any more luck wresting the Chinese-conquered regions of the Americas from China?
Because Spain would be arriving with a fresh force, while the conquering Chinese armies may be elsewhere conquering something else? Because Spain has more practice fighting other gunpowder fighters in Europe, whereas China (I assume) doesn't?
Rather, why should China have any more luck preventing Spain from conquering conquered areas so far away than the Aztecs?