Not getting or can’t find certain emails? Maybe you are getting them, but Outlook is ‘hiding’ them from you. I’ve found the most likely hiding place for email is in the “Other” inbox. The default setting for Outlook uses “focused” mode. This puts items from places like mailing lists in a separate “Other” inbox to help keep you focused on your productivity. If you are set up like this you will see a tab labeled with Other. A lot of random stuff ends up in that inbox.
If this didn’t find your missing email, take a look at this support article for help finding your missing emails.
https://support.microsoft.com/en-us/office/email-is-missing-from-your-outlook-com-inbox-c70b4a9a-caa5-4e8c-a88a-3372215af25e
Hopefully, one of the listed suggestions will lead to your missing email.