Adding along for transfemme folks that in addition to an ED medication to encourage continued use and bloodflow, that topical t-gel is not masculinizing, and helps protect the tissue and reduce atrophy, and help keeps the tissue healthy both pre and post-op. It's the same tissue being repurposed post-op, so it's still at risk of atrophy, so the same stuff can help reduce tissue atrophy.
That's right, t-gel is helpful even if you plan on getting a neovagina, because "If you're asking a doctor to fold an origami cat, it's best to bring them the highest quality paper." Healthier tissue is easier to work with and more likely to result in a successful surgery.
Similarly, as much as a lot of people find it gender affirming, please think carefully about deliberate long-term use of cock-cages -- those kinds that result in substantial shrinkage. If you're looking to get a neovagina, you'll want to avoid prolonged cock cage use for the same reasons-- less tissue, thinner tissue, atrophied tissue, unhealthy tissue, will have poorer outcomes for surgery.
Cock cages and the associated shrinking are GREAT for transfemme folks who want to KEEP their bits/don't want surgery, but want to minimize them, keep them small, and to reduce the dysphoria of a larger, more prominent penis. But they can be a setup for FAILURE if one is trying to get a neovagina constructed.
Please be safe, and good luck and much love. World may be spooky, but we're all in this shit together. Rooting for you.