As I understand it all the power still have holdings in the East but these are in the form of trading quarters and factory towns rather than extensive land holdings. So for example a Spanish, Lothringian, or Triune ship would have multiple ports of call all over SE Asia that would still allow them to make a profit and ply their wares; the problem with these is that they are all beholden to local power brokers and they are also shut out of any ports the Rhomania directly controls, which at this point is all of Ceylon, Malaya, Philippines, amongst the most glaring.I think Spain still has a couple holdings here and there but overall yeah, Rhomania in the East largely broke European power in Indonesia/India aside from their own.
RITE on the other hand has extensive landholdings that not only allow them to have domestic manufacturing capacity; the only European power to do so; but also have an extremely large manpower pool that they can recruit sailors. traders, and soldiers from. It isn't apparent yet; because both Spanish Malaya and English Bengal were just recently conquered and destroyed respectively; but within 2 or 3 generations Rhomania will dominate all of island Asia and SE Asia aside from native powers simply because they will be able to flood the area with ships and men at a rate that Europe won't have a hope to match.
The status of native powers on the other hand will be an interesting one. I don't think we are going to see all of the area colonized as happened historically. Thailand, Vietnam (Cham), and Java at a minimum all appear set to be able to reform into modern states capable of standing toe to toe with European powers. Whether they do so as fully sovereign states or in some level of association with RITE or another European power however remains to be seen. Of course it is also entirely possible that their attempts at reform and modernization all fail once the next generation of leadership arise and the entire area slowly falls under the sway of RITE over the course of the latter half 17th and 18th centuries. I assume at least 1 or two of them modernize only because B444 has said he wants a more multipolar world and a strong Cham and Java would be major player regional powers. Of course at the end of it it is mostly author fiat that decides the fate; for all we know RITE falls apart in 1750 from a plague and the entire region is taken over by a rapidly expanding Japanese Empire that creates the Greater East Orthodox Co-Prosperity Sphere.