I use a vivo Fold 3, there's no VPN option available. Only from within the proton app.
Like Surfshark, an auto connect when no WiFi would be so good. And then, auto disconnect when on trusted WiFi, would be a great addition. As my router is always connected through proton VPN, there's 2 vpn's active when I'm home. And always need to manually disconnect the VPN ... In 2025... Please add these features.