Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello, thank you for reaching out to Microsoft Q&A.
If you've been added to a Microsoft 365 Family subscription, your license should appear under your Microsoft account on the Services & Subscriptions page, where you can download and install the Office apps on your Mac.
https://account.microsoft.com/services
If you haven’t joined the family group yet, ask the organizer to send you the invitation link to join the family subscription by email. Once you accept the invitation, you should see the subscription listed under your Microsoft account.
For reference,
Download, install, or reinstall Microsoft 365 or Office 2024 on a PC or Mac
Let me know if you still need more help.