Proton, in its recent 2022 roadmap update, has confirmed that it is actively working on a ProtonMail app for Windows. However, no release dates and such were shared at this time as it is still early.
Protondrive beta RSS
Proton has announced its Black Friday sale. Discounts are available for a little under two weeks and if you get ProtonMail and ProtonVPN Plus you'll get early access to ProtonDrive beta.