The speed with which the endo grows back varies from woman to woman. Endo can grow back as quickly as 6 months for some, but take years for others. I had a lot of endo removed at my first lap but not much had grown back by my second lap, in spite of symptoms feeling like they were progressing quickly back to what they had been before.

For me (36yo and severe endo), I'd give myself 6 months to TTC without a lap (and that is actually what I did last year - 6 months TTC then got a referral back to my GYN for my second lap), but if I were your age and had only mild endo I'd probably wait the full 12 months instead.

That said, if you're concerned, it's worth discussing it with your Dr. Endo doesn't really follow any rules, so you should trust your instincts and your Dr's experience to determine the best path forward.