The other comments in this thread about the recovery aren’t as optimistic as you are. It seems there is significant damage and it takes quite a long time to recover, if it does.
There's many variables, what kind of antibiotic, their biome before taking the antibiotics, what microbe species were killed and how many were harmed/killed, etc.
There's only a few total comments in this thread overall, I counted 2 anecdotes, not exactly a scientific consensus.
And people are more likely to comment when something goes bad than when something goes good *checks product feedback*
