The new M365 Outlook is just webmail. Every upgrade is actually a reduction in functionality as they align to the web version. The good news is this eliminates the need for Windows.
Outlook and Teams have PWAs that are actually more performant than the desktop apps (anecdotal). They are missing some features, but for the opportunity to use Linux at work, I make it work. Have to use Ubuntu for some unknown reason, but it's better than using Windows