I use Tailscale to connect between my devices. It assigns IP addresses to my devices from the 100.64.0.0/10 address space, which is not publicly routable, since it is a private address space intended for CGNAT. I want to be able to connect to my devices on this pseudo-internal network as well as using the Google Fi VPN for all my other traffic. How can I make this happen?
In theory, it could be done with VPN daisy-chaining, but this is apparently not possible on Android. Can it be done if I am rooted, or is there any other way to do it?