@Helge Garder Thanks for posting in our Q&A.
For this issue, I have done a lot of research. I find that the request in the following article will make it.
https://learn.microsoft.com/en-us/graph/api/servicehealth-get?view=graph-rest-1.0&tabs=http
I have tried the following URL in my lab. I can see the Service with ITxxxxxx.
"https://graph.microsoft.com/v1.0/admin/serviceAnnouncement/healthOverviews/Microsoft intune?$expand=issues"
Hope it will help.
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