AWS SSO SCIM API ListGroups members

I'm using the AWS Single Sign-On SCIM implementation API for and integration of AWS SSO with Google workspace, the project is here: https://github.com/slashdevops/idp-scim-sync/ and I also contributed in the AWS original one: https://github.com/awslabs/ssosync which is not active anymore.

The integration I did is working fine but it is very inefficient because to find the members of the groups I implemented Bruteforce mechanisms (see here: GetGroupsMembersBruteForce), thanks to that the ListGroups doesn't provide us with the members in the request and there is no other way to have these.

Official documentation:

• https://docs.aws.amazon.com/singlesignon/latest/developerguide/listgroups.html

so, the question is:

When do you be able to include the members list for the ListGroups endpoints?

this API have some time already published and we are waiting so long for this feature.