500 errors connecting to MS Graph Calendar API

I'm terribly sorry but there seems to be no way to report MS Graph API related errors anywhere. MS Graph APIs are failing randomly for outlook users for over a week now:

https://learn.microsoft.com/en-us/answers/questions/2279133/getting-500-response-errors-to-get-me-calendars-al

It's affecting all 3rd party apps. Please can anyone within the MS Graph team help?