In the last year or so a lot of email providers have moved away from basic authentication to modern 2FA authentication, specifically OAuth2.
Jolla has responded by introducing new account types, specifically Microsoft 365 which provides modern authentication for Office365 Exchange email, and there is also OAuth2 for GMail as well.
However, the missing piece of the puzzle appears to be OAuth2 for IMAP, arguably the most prevalent modern email protocol out there and used by nearly all email providers, including Microsoft.
As more and more providers move towards OAuth2 for IMAP, the SFOS email client will become less and less useable.
This request is therefore for Jolla to implement OAuth2 for IMAP.