I guess I’m not using proxmox for anything other than managing VMs, network bridges and backups.
And LXD/Incus can do that as well for you. Install it an by running incus init it will ask you a few questions and get an automated setup with networking, storage etc. all running and ready for you to create VMs/Containers.
What I was saying is that you can also ignore the default / automated setup and install things manually if you've other requirements.