In case y'all missed it in the first post, and you just want to try this out, it's working in this v86 image:

https://copy.sh/v86/?profile=custom&m=768&vram=16&hda.url=ht...

You can start tailscaled and tailscale inside the VM. It may take a while to come online sometimes due to limited proxy availability.

Edit: alt gives you the third button. To start a terminal, hold alt and right click, select new, release alt, and right click drag to size the terminal window.