That is just an implementation detail. It's trivial to create your own local CA, put it into the trust store of your device, use a cert signed by it and be done with it.
For the last decade or so I've gotten about 1k hits per day on my self-signed HTTP+HTTPS site. Random people will click past the scare tactics of modern browsers re: self signed if the topic is already technical and the demographic understands browsers are stupid. But all these people would be unable to visit under HTTP/2 or HTTP/3 only.