Hey there!
Year ago I was inquiring - Authorization Core support for groups roadmap clarifications - when/if groups will finaly be available not only to Authorization extension, but to Authorization core as well . Authorization Core vs. Authorization Extension is more information.
Also I reckon in some support ticket support team hinted that 2022 Q2 might bring some news on this.
Am wondering if auth0 team could provide status update?
Thanks a lot and kindest regards!
Tom