I believe Let’s Encrypt only allows wildcard certs for DNS challenges so it’s not really in the scope of Nginx; but I haven’t used other web servers, do they implement that?

Edit: Looked into Caddy, it seems to have a plugin system for DNS providers, that’s pretty slick. I can’t see that ever happening for Nginx they seem very opinionated in wanting to be unopinionated unfortunately. I’m still sad they rejected the PR to implement prefers-color-scheme for default error pages.