Running in a IPv6-only server

[EricaKN]

Hello. I'm trying to run the docker-compose.yml in an IPv6-only server, but it returns an error "Failed to fetch http://deb.debian.org/debian/dists/bullseye/InRelease Could not connect to deb.debia.org:80 *151.101.66.132). - connect (101: Network is unreachable)."
even after some configuration changes on "docker-compose.yml" file, s.a.: ports in ipv6 format and addition of a "networks" block:

networks:
  bridge:
    external: true

Does anyone have an idea how to debug it?