In case your company email policy blocks Pixel 6 native Calendar app to access Office 360 email/calendar, You can do so via the help from Outlook email app from Microsoft.
In Outlook app, Office 365 account settings has one Option: Sync calendars. Turn it on, and Office 365 calendar will show up on your Pixel 6 Calendar, so you have one place to check all your schedules on Pixel 6.
Sometimes, Outlook updates might overwrite this setting, so just go back and enable it again.
Yes, you can publish your Office 365 calendar as URL, then access it via Google calendar from web browser, but currently, native Calendar app on Pixel can't not subscribe published Office 365 calendar yet.
