Hey. If you are on the current macOS version, please confirm, does Outlook open in Safe Mode if you hold the Shift key while launching the app?
Because Outlook for Mac states that crash issues after an update are usually resolved by installing the latest Outlook build from the Mac App Store and ensuring macOS is fully updated, as stability fixes are delivered through app updates. If Outlook still crashes even on the latest version and after a restart, the supported next step is to contact Microsoft Support so they can review the crash logs linked to your Outlook version and macOS build.