I’m fairly certain they didn’t want to include it but felt it was the only way to offer the same/better service over revanced.
I’m sure as hell happy about that. I understand the creators need their sponsors but at the same time, I cannot stand ads. Like this I’m keeping his app and frequent it more often.
This is their official documentation
On the bottom under manual configuration they tell you how to configure it on Linux.
Though personally I ended up opting for AirVPN only because I didn’t want to mess around with scripts to keep proton’s ports from expiring.
We’re talking about an unofficial app that has been modified to allow premium features for free.