If not Strava... companion app official segment leader boards

Hi there is might be naevety on my part, however, why are there still some ‘segments’ within ZWIFT that I’d love an official leader board for. I appreciate that this might be difficult in Strava as the community can create whatever segment they choose, however isn’t this something that could be created in the companion app. Seeing an ETA and being able to push myself is a true motivator!