DoH3 pcap needed

I would like to see a pcap with Keylog for DoH3 traffic using google or cloudflare dns

DNS-over-HTTP/3 (DoH3)

What are you using to capture the pcap file?

I am using Wireshark. If you have a pcap, I want to take a look.
My connection always falls back to HTTP/2 . I tried increasing http3_fast_fallback_timeout to a very high value but get "Firefox wasn’t able to connect to "

I use alt-svc-mapping-for-testing -;h3=“:443”;h3-29=“:443”

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