View your Microsoft 365 meeting room calendar in one place

Solution 1: Microsoft （free)

Outlook, Teams calendar meeting scheduling assistant view can view

Solution 2: Thid Part (Not free)

Cloudwell

https://cloudwell.io/products/calendar-overlay/

shortpoint

https://support.shortpoint.com/support/solutions/articles/1000293344-how-to-display-office-365-room-calendar-view-in-sharepoint