This is the kind of stuff that JWST is good at and so interesting. Well I mean, in addition to finding exoplanets and what their atmosphere is made of. But this galaxy stopped forming new stars 13 billion years ago and the universe is 13.8 billion years old. Why wouldn't it be able to form new stars when the universe had so much dust and particles around?
Oldest 'dead' galaxy ever seen defies current models of the ancient universe
https://www.space.com/oldest-known-d...pace-telescope