Deployed item (Application or Task Sequence) isn't displayed in the Application Portal.
It's because of the time difference between the computer running SCCM Console and the Mac.
By default, deployments get the option "Schedule when this deployment will become available" bound to the local time of the computer running the SCCM Console:
If the Mac is in other time zone, it may have to wait for the specified time to come.
Wait for some hours or adjust the time in the deployment properties: