Obtaining openstack compute servergroup v2 ID without Data Source

terraform-provider-openstack/openstack:1.54.1 (latest)

Dear community,
I’d like to create a Openstack VM with openstack_compute_instance_v2. To place it into the already existing Servergroup “test”, the documentation says that I’d need the ID of that Servergroup for scheduler_hints. To my understanding, there is no Data Source for that, I could only create a new openstack_compute servergroup_v2 :

Is there any way to obtain that ID via Terraform? Manually importing the ID isn’t really feasible in this case.

Thank you for your help!