How old are you? People have come back from similar situations, I wouldn’t expect a thick head of a hair, but maybe full coverage again.
I’m currently 30 years old. Started thinning and losing my hairline at around 19 and been just shaving my head since 26. Been busy and lazy lately so I let it go for like 2 weeks and took some pictures out of curiosity.
30 is young, younger people seem to have better odds.