Finally found a work around for getting the mullvad client working on immutables like Silverblue/MicoOs

From this post: https://github.com/mullvad/mullvadvpn-app/issues/1570

1. Install the RPM

2. Run `sudo systemctl enable --now mullvad-daemon`

3. Run `sudo rpm-ostree install libappindicator-gtk3` as it is not installed by default on Kinoite.

4. Reboot. Live applying will not work.

My guess is that now that the Mullvad binaries and services are not symlinked, they work.

Silverblue users only need these three steps:

Install the RPM
Reboot
Run sudo systemctl enable --now mullvad-daemon in Terminal