It works for me in GrapheneOS, should work on regular Android, too? What I’m missing is a dedicated Proton contacts application including integration into the phone app.
Are you talking about the Bitwarden app mentioned here for 2FA specifically (because apparently it’s not very good) or the Bitwarden/Vaultwarden (backend) password managers (which are great)?
I did a similar setup for my own cloud on several Raspberry Pis (one master and two backup devices). The backups are placed offsite and sync the entire content of the master device. The next step I want to try now is running a Proxmox cluster (on x86) that now only syncs contents but also provides identical copies in a high availability setup (like a “real” cloud would).
Is there an overview of which COD games work on Linux?