How can I add a Google Calendar in Outlook for Mac?

I am a user of Outlook for Mac. I work part time at two companies simultaneously. My primary organization uses Microsoft 365 for all purposes including email, Office, Teams, etc. My secondary organization uses Google Workspace. I wanted to have my secondary calendar be visible in Outlook together with my primary one so that I can plan my day accordingly, but after much investigation it is clear to me that there is a critical lack of features specifically in the Outlook for Mac application that does not allow me to do so. 

• Somehow a Google calendar cannot simply be shared to a Microsoft 365 account. Even when I share the calendar, no email is sent to the Microsoft account at all – this is possibly a Google issue. However, the Outlook online webapp has a Calendar feature to “Add personal calendars”. This feature has Google integration so that when I add my secondary account here, it asks for a Google sign-in and the calendar shows up on my Outlook online. However, this integration is not then reflected in the Outlook for Mac application, neither does the Outlook for Mac application have the “add personal calendars” feature.
• The other option for me is to add the secondary email account to the Outlook for Mac application, since the desktop app is an email client rather than just a portal for my primary organization’s Microsoft 365 email. However, this account addition is not restricted to the calendar and as such adds my entire secondary organization’s email account to Outlook for Mac. While I do not want this integration, I could do with it if there was an option to disable notifications for my secondary email. Not only is there no option to disable notifications by account, one cannot make rules for a non-Microsoft 365 email either to get around this issue. The last option would be to disable all email notifications and make a rule to enable notifications for the primary account but apparently the functionality of a rule action to enable desktop notifications has been removed from the latest Outlook for Mac application.

As per the above description, there is a critical gap in the features for the Outlook for Mac application that doesn’t allow me to do the simple task for sharing my calendar across two accounts. I have explored this issue thoroughly with my primary organization’s IT services and Outlook for Mac customer support.