We are now 'open' to selling/giving Ukraine A-10s.
They probably won't see the end of the war there, but they can definitely go out doing what they were meant to do, blasting the fuck out of Russian tank columns and artillery units.
F-16's Would be More Useful if We're Going to Give them new jet aircraft IMHO. It'll take months to train pilots on new planes and F-16s are more versatile and we got hundreds of them as do NATO allies.
A-10's are fine but it wouldn't be a priority compared to other aircraft. Sure they could replace Su-25's but it'll be using missiles and rockets, not it's cool gun in a vast majority of the time.