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Hi Consila Innendienst
Thank you for reaching out to the Microsoft Q&A forum.
To better understand your issue, could you please provide a bit more information?
-Could you please confirm whether you're currently accessing the Microsoft 365 Admin Center from a mobile device? If so, could you try using a desktop or laptop instead and let me know if you experience the same issue?

-Could you share a screenshot of the Support page in the Microsoft 365 Admin Center where the New service request option is missing? You can send the screenshot via private message to avoid exposing any personal or organizational information publicly.
-When you open the Microsoft 365 Admin Center, do you see the blue Help & support (headset) icon in the lower-right corner?
-When you turn off the AI Support Assistant, do you still see the Contact support button at the bottom of the panel? If so, what happens when you click it?
-Have you ever been able to successfully create a support request from the Microsoft 365 Admin Center before?
In the meantime, you may also want to try the following:
-Check whether your Microsoft 365 subscription is still Active in the Microsoft 365 Admin Center.
-Create a new Global Administrator account and sign in with that account to see whether the New service request option becomes available.
Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution.
I look forward to your update.
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