Taiwans navy was never much.
Its airforce was its main branch.
That is still numerous but hasnt really been upgraded since the late 1990s. Its F-16’s are just block 20. Its Mirage 2000’s are just a bit newer.
I remember the early-2000s in FR where some FReepers would say China posed no threat to Taiwan because (i) they did not have a sea lift capacity to transport troops; and (ii) the Taiwan Air Force and Navy would annihilate them. That was just over 15 years ago, and it just goes to show how much change can occur in such a relatively short time.