Very cool! I started using webinoly very recently on my new server, I'm liking it so far.
I had a little bit of trouble getting HTTP3 to work but after reading the referenced nginx blog I noticed http3 needs to accept traffic over UDP. After adding 443/udp to my firewall it instantly functioned.
By the way, I was getting a deprecation warning:
nginx: [warn] the "listen ... http2" directive is deprecated, use the "http2" directive instead in /etc/nginx/sites-enabled/
# This is old
listen 443 ssl http2;
listen 443 quic reuseport; # QUIC
listen [::]:443 ssl http2;
# Should be
listen 443 ssl;
listen 443 quic reuseport; # QUIC
listen [::]:443 ssl;
http2 on;