Missing task "Admin - Remove a member from the blob store group" (Community Edition)

Hi, following the guide Moving a Blob Store I convert an existing (old) blob store into a group and add a new created blob store into it. But the next step to create a scheduled task (“Admin - Remove a member from the blob store group”) to remove a member can’t be done, because the task is not available. I use the community edition 3.91.1 (self hosted).

Is this feature available in CE? The feature matrix does not mark it as a pro feature.

What do I miss?