curl HTTP/3 with OpenSSL 3.5 may be coming you way soon. Tatsuhiro, the maintainer of ngtcp2, did the (unnecessarly) heavy lifting to adapt and I did the comparatively few changes for it in curl.

Once ngtcp2 releases, we can merge that hopefully for the next curl release. If you want to test, see:

github.com/curl/curl/pull/1702…
#curl #http3

ngtcp2+openssl support by icing · Pull Request #17027 · curl/curl

With the new addition of QUIC support and the support in ngtcp2 main branch, make the necessary adjustments in curl to support this combination. add support in configure.ac to detect the feature O...

^GitHub