Hi!
Polyps in our kitty friends are quite common. I am a surgery technician that assists Dr.Magnifico and we have seen and removed more than a handful!
We have noticed not many vet offices check for polyps and typically it’s what we end up finding. (Not always the case as some cats are chronic upper respiratory forever)
This surgery is typically not a budget breaker. Please reach out and never be afraid to ask many questions to your veterinarian!, That’s what they are here for ,
Honestly, I’d be looking for an oncology specialist to determine if it really is a tumor of some sort.