just got a response from the dev. It is still being worked on https://www.reddit.com/r/MoneroMerchants/comments/12s8fwt/comment/jgxkn6t

no installation needed

Works great, I’ve never had issues. I’ve only had one prof that used lockdown and which I told them. I use Linux, and it doesn’t support it, so they made accommodations (Schools are required to). I use the containers in the software to install various scripts for marketing etc. Flatpak’s are nice and easy to use. It has native AppImageLauncher support.

I’ve been using Linux for 3 years in college

My Linux distro hop went ZorinOS -> Fedora Workstation -> Nobara Linux -> Now (VanillaOS)

you need a vpn for start, we recommend protonvpn, mullvad vpn or ivpn ONLY THESE are the most trusted in the game