I am not a doctor nor do I play one on the internet, but yes, vaginectomies are performed as part of lower surgery with urethral hookup, either meta or phallo. A total hysterectomy has also been done prior to this or in conjunction with this (some surgeons do the total hysto at the same time as the whole lower surgery procedure. It would be medically impossible to have a vaginectomy without a hysto (period blood needs to drain somehow; and yes some guys on T still have bleeding issues), and can't have a vaginectomy without re-routing the urethra, because the pee needs to come out.