QUIC、HTTP3 not working

I tested on HTP3check.com and found that it supports QUIC,
but HTTP/3 Test | Ensure Your Website's Speed and Compatibility The result is that QUIC is not supported.
I still display it as HTP2 in the network tool of Firefox

Does this website currently support QUIC and HTTP3?

The configuration of HTP3 in Firefox and Chrome browsers is opened

Cloudflare sets the correct alt-svc header to indicate HTTP/3 support, and 58wacai.com loads correctly over HTTP/3 on my end. This might be a client and/or network problem (e.g. UDP packets on port 443 are dropped). Rest assured HTTP/3 will work correctly on clients and networks that support it.
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@albert
Wow, your reply is very important to me. Thank you very much. Have a wonderful day

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