I dont have tracing enabled but I see GET request in the /var/log/messages. here is what is in the logs.
Jun 15 18:04:26 {hostname_removed} pulpcore-content: [15/Jun/2021:18:04:26 +0000] “GET /v2/{product_repo_url_folder_path}/manifests/latest HTTP/1.1” 302 0 “-” “docker/20.10.7 go/go1.13.15 git-commit/b0f5bc3 kernel/3.10.0-1160.15.2.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/20.10.7 (linux))”
Jun 15 18:04:26 {hostname_removed} pulpcore-content: [15/Jun/2021:18:04:26 +0000] “GET /pulp/container/{product_repo_url_folder_path}/manifests/latest?validate_token={token_id} HTTP/1.1” 200 3538 “-” “docker/20.10.7 go/go1.13.15 git-commit/b0f5bc3 kernel/3.10.0-1160.15.2.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/20.10.7 (linux))”