Proxmox is a virtualization platform based on Debian. It’s not supposed to have a GUI, the management is either done via web UI or SSH.

But since it basically is just Debian with some more stuff, I installed Plasma on top of it.

It is also not supposed to use WiFi since that won’t work with Linux bridges. But, after removing the adapter from /etc/network/interfaces (which gets automatically added any time I make a change through PVE web UI) and rebooting, I was able to make use of the adapter inside Plasma. And also create a bridge on proxmox, add IP to it, enable IP routing, and NAT everything coming from that subnet (used for VMs) through the WiFi adapter.

I just wish the noVNC could dynamically resize VM display like with VirtualBox after installing guest additions.

There is no use case. It can be done, that’s it. I also tried to install Proxmox on my phone under Limbo PC emulator (QEMU-based), but I couldn’t avoid random kernel panics during installation.

Also, Proxmox with 10GiB of available RAM (8+4, 2 for GPU), where the host uses up 3GiB is not really ideal. And on a weak dual-core CPU, on top of that.

Edit: But now I got an idea.
Now, there are issues. The simple solution will create multiple SSH connections that will never leave the laptop - that is - useless encryption, aside from other likely issues. The main thing is extremely easy set-up.
OK.
Thing 0: Exchange and authorize SSH keys between host and VMs.
Thing 1: Create another ext4 or whatever volume on LVM, and mount it on host (probably better to have VM with large disk - why should every VM have SSH access to host). This will be used for file sharing.
Thing 2: Mount it on all desired VMs using SSHFS.
Thing 3: Install waypipe (like ssh -X, but for Wayland) to VMs and host.
Thing 4: Create shortcuts on host desktop for desired GUI applications (which will run on VMs), prefixed by waypipe command. E.g.: waypipe -c none ssh user@debian-main.home.arpa firefox.

Waypipe works with vsock as well, which might be useful in this situation, but I have no idea how that’s used, and if it is relevant here. Based on the man page, it does sound like it though.
But anyway, mostly just a concept.