finasteride and miniaturized hairs

On average how long do you think hair must’ve gone if Fin even has a chance of regrowing? Like would it only have the possibility of regrowing hair lost in the few months before starting Fin or could it also grow areas that have had minituarized/bald areas for 2 years?

Finasteride in some people reverses miniaturization. It can take up to a year to see the value