Http/3 not working

I activated h3 option in my domain But still, the advertised protocol is h2. I checked with other browsers and tools and got the same result.
Is anybody got the same problem?

It’s HTTP/3 for me with Firefox on MacOS.

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Not for me on Safari 15.1 on MacOS 12.0.1? I don’t see the alt-sec header either, which should advertise HTTP/3.

%curl -o /dev/null --dump-header - --silent | grep alt-svc

% curl -o /dev/null --dump-header - --silent | grep alt-svc alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400, h3-28=":443"; ma=86400, h3-27=":443"; ma=86400

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