@Adam Wood Thanks for posting in our Q&A.
For this issue, it is not related to windows 365. Based on my research, I find that only Global Administrator and User Administrator has the permission to add or delete other users. However, the two roles also have the permission to reset password.
So, it seems that it doesn't make all the requirements. Given this situation, it is suggested to contact Microsoft 365 to double confirm. Here is the support link:
Hope it will help.
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