Mstn 2024 has some surfaced some iTwins Collaboration functionality as a Tech Preview.

Sheet Index: The iTwin repository would include dgns used for both 2d as well as 3d. Mstn projects typically have both 2d and 3d dgns federated into a master source. Need to be able to navigate efficiently between drawing dgns as well as 3d models using the Sheet Index. The Sheet Index should pop up in the iTwin viewer's tree?