I have heard of this. Lucky I wasn't one to experience hair in the free flap. I don't have much hair on my legs. Wife is jealous. My team had mentioned if that would be an issue there was a way they could zap the hair follicles.
Anything in the mouth that isn't "normal" just feels weird. Hard to ignore yet I think we get used to it. If I run my tongue around my mouth, nothing feels right anymore. I am more or less used to it after five years.
Maybe you could run this past your team at the next check-up.
Do you know a dentist that moonlights as a barber? Too soon? If we don't find some humor in this we end up screaming in the night.
My wife takes every opportunity to say "There he goes, putting his leg in his mouth again". To which she is corrected by her friends "Don't you mean foot in his mouth?"
"In his case it is actually his fibula, so 'leg' works."
I truly do hope all else pans out well for you during the recovery. I have had to have excess flap removal done three times now. Still can't play my bugle. Still drool occasionally. Get food trapped under my prosthesis. But all in all living a much improved existence and glad I had it done. Good healing.