I've used Outlook for email for years on my MacBook Air. One day it just stopped opening. Not as a result of an update. I'm using Monterey on a 2020 MacBook. I have Office 2019 installed. All my apps are up to date. I uninstalled and reinstalled Office. No change. When I look for Apps listed in Finder, I see Word, Excel, but not Outlook. I can access Outlook on my iPhone 12. I can also access emails through the Mac email app. Outlook has features I like, including groups so it is my preferred email.