(I mean, ask about difficulties with vaginal delivery of the child if you don't have surgery. Will the vagina stretch enough to let the child out, or will the septum be in the way?)
I had a uterine septum removed, and it was no big deal. But talk to a specialist. Ask especially about difficulties with vaginal delivery of the child if you get pregnant.
I would consult with a specialist for advice. It may be necessary to have the surgery. Good luck