I just have a quick go through on the current inventory of fighter jets in ROC Airforce. The numbers below may not be 100% accurate since they are from Wikipedia.
Total number of aircraft =>577
Total number of fighter jets =>431 before accounting for total retirement of F-5E and F-5F which were to be retired in 2024.
Total number of fighter jets less F-5E/F = 388
Of the 388 fighter jets, only 66 are modern F-16C/D block 70, the rest are:-
F-CK-1 => 129 aircraft of more than 25 years old
F-16A/B => 140 aircraft of more than 20-25 years old.
Mirage 2000-5 => 53 aircraft of more than 25 years old
Surface to Air missiles systems (under air force command) are:-
Patriot 2 and 3 => 9 systems with 386 missiles.
Sky Bow II => 6 systems with unknown number of missiles
Sky Bow III =. 12 systems with unknown number of missiles.
AIM-7 Sparrow/ RIM-7 => 500+ missiles under the Skyguard system.
Main air base is at Hualien at the East coast of the island where the latest F-16C/D are assumed to be based.
So, if AR starts, ROC fighter jets' life span will last not more than a few days if they flew. Or they may stay until end of war in the mountain caves in Hualien airbase.
If PLA will to launch more than 5,000 drones, they should be able to deplete or destroy practically all SAMs. Of course PLA has other weapons like ARM, long range rockets, short range ballastic missies etc to deal with the SAM sites.
PLAAF should be able to gain air control all over Taiwan within a day or 2.
For starters all F-16s have upgraded to F-16V standards as of 2023? Not that it matters much.