[taffer]

You will get most of the benefits of HTTP 3 even if your app libraries run HTTP 1.1, as long as the app is behind a reverse proxy that speaks HTTP 3.

[theandrewbailey]

I use HAproxy to get HTTP/3.

https://www.haproxy.org/

https://haproxy.debian.net/

https://www.haproxy.com/blog/how-to-enable-quic-load-balanci...

[kunley]

Yep, for example, Caddy (zero special configuration to enable HTTP 3)