Dear Enno,
Good day!!
Apologies for the inconvenience caused and please don’t worry, let’s work together on your concern and move towards a resolution path.
I understand your concern and I have done some search, where I understand that when the user who created the Loop workspace left the company or the organization, the Loop workspace created by the user will not be deleted but the Loop workspace will be ownerless and it’s not possible for the admins to assign another owners to the ownerless workspace:
Reference: Overview of Loop workspaces storage and permissions | Microsoft Learn
Regarding the workspaces located, it depends on the where the Loop workspace is created:
Reference: Summary of governance, lifecycle and compliance capabilities for Loop experiences | Microsoft Learn
Appreciate your patience and understanding. Have a great day!!
Best Regards,
Sophia