Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Cath, welcome to the Microsoft community.
I understand that you want to run Microsoft 365 on your Mac, but the latest Microsoft 365 only supports the latest three versions of macOS.
The following link lists the update history for Office for Mac, and some of the newer versions provide download links:
Update history for Office for Mac - Office release notes | Microsoft Learn
This article states that the October 2024 Update (16.88) is the last version that supports MacOS Monterey 12.7:
Upgrade macOS to continue receiving Microsoft 365 and Office for Mac updates - Microsoft Support
The earliest version provided by the link is the July 16, 2019 (16.27) update. Therefore, as long as your macOS is not too old, I believe you can find what you need in the update history.
Of course, to use these old version installers, you still need a Microsoft 365 subscription.
I hope this information is helpful to you!
Best regards
Eliac | Microsoft Community Support Specialist