@Sokoban,Thanks for posting in Q&A.
From your description, I know that you are looking for a method to migrate Configuration Manager to Intune.
Based on my research, I found that there are several methods you can refer:
1.Add tenant attach.
2.Set up co-management.
3.Move from Configuration Manager to Intune.
4.Start from scratch with Microsoft 365 and Intune.
Hope this can be helpful.
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