The whole "popping cherry" idea with the hymen for cisfemales is a MYTH. Look up "You can't pop your cherry Hymen 101" by lacigreen on youtube.
Also hymens aren't generally created during SRS as it would be nearly impossible to provide the proper blood supply to a membrane of tissue covering the new vaginal opening (not to mention, where would you source the material anyway?). Otherwise, you can bleed from dilating, sex, and vibrators. The neovagina is a bit of a surgical site for quite some time after all. I myself luckily haven't dealt with a lot of bleeding from the vagina, but it's happened a few times from vibrators and dilating.