not able to see H3 under protocol column in browser network tab

[allenanimal714]

I'm trying to use this image, so I performed a simple test without making any modifications:

• git clone repo
• ./run_docker.sh
  2025/03/14 17:07:05 [warn] 1#1: "ssl_stapling" ignored, issuer certificate not found for certificate "/etc/nginx/ssl/localhost.crt"
• open another terminal, curl -k -I https://127.0.0.1:8889

HTTP/2 200
date: Fri, 14 Mar 2025 17:14:19 GMT
content-type: text/html
content-length: 32
last-modified: Sat, 23 Sep 2023 01:06:45 GMT
etag: "650e3a25-20"
x-frame-options: SAMEORIGIN
x-xss-protection: 1; mode=block
content-security-policy: object-src 'none'; frame-ancestors 'self'; form-action 'self'; block-all-mixed-content; sandbox allow-forms allow-same-origin allow-scripts allow-popups allow-downloads; base-uri 'self';
expires: Sat, 15 Mar 2025 17:14:19 GMT
cache-control: max-age=86400
alt-svc: h3=":8889"; ma=86400
accept-ranges: bytes

I'm not sure what I did wrong?