UPDATE 1845 UTC The issue that was preventing the deployment of SU3 has now been resolved, and the update is now gradually rolling out to all players on all platforms. Thank you for your patience as our teams worked to resolve this issue.
We are currently investigating an issue with SU3 not deploying properly to some players on the Xbox and Windows (MS Store) platforms. We are working to resolve this issue and get SU3 deployed to all players as quickly as possible.
Steam users are not impacted by this issue.
Thanks,
MSFS Team