RSAF don't have A-10s..
In the early stage, RSAF had Hawker Hunters, F-5Es, A-4
Skyhawks.
BTW, A-10 can't operate well in urban environment full of high rise
buildings..
A-10 are designed to fly low, hit hard at column of armoured
vechicles in a large open field with low height trees ( so that
A-10s can turn away quickly ) before mobile AAs can react..
RSAF prefer to use helicopter gunships to operate in urban
environment.