Make sure the group is a part of your workspace. In SQL you can run show groups to see whether the group is available or not.

If the group does not show there, go to Settings -> Workspace Admin -> Identity and Access -> Groups

and add the group into the workspace.

https://learn.microsoft.com/en-us/azure/databricks/admin/users-groups/groups#add-groups-workspace

If the group doesn't show from the Add group button, then you may need to add the group in the Account console:

https://learn.microsoft.com/en-us/azure/databricks/admin/users-groups/groups#account-console