This is becase auto-negotiation doesn’t support anymore synce the middle of september, 2024.
Despite the documentation stated oppsite.
1.5 night builds: No ethernet adapters avalable in Citrix Hypervisor 8.2 Environment - Bugs - VyOS Forums
There was my topic in dare attempt to resolve the issue for inplace image upgrade.
But somewere i’d read that duplex auto and speed auto would not supported.
Since 20240916 any configuration shouldn’t have these settings.