My grandfather had this, and had it corrected in his 40s, iirc. Before my time by a country mile, but my mom has talked about it. He did not regret it, but that’s as much as I know.
When I was a kid that little flap of skin would get stuck between my front bottom teeth and it hurt like hell. They basically touched it with a razor just enough to draw blood and it lengthened it enough not to happen anymore. Like, the tiniest, tiniest cut. I doubt that’s helpful, but thought I’d share.