We test builds for nginx with http v3 (ex-QUIC) for CentOS 7. To get it, you need to install and configure our test repo:
yum install -y https://repo.codeit.guru/codeit-repo-release.el7.rpm epel-release && yum-config-manager --enable CodeIT-testing --save
The package has version 1.26.1-2, but defined nginx binary version is 1.27.1. This is a known issue. See bundled /etc/nginx/conf.d/default-ssl.conf.example for working HTTP/3 configuration example on port 443/UDP! For testing purposes only!