Putting this item under review so we can investigate the scenario. Currently you can use Flow to automate posting. DRI/POC can be maintained in a list or file and message can be sent to Teams channels at designated intervals. For schedules as mentioned you might also consider using the Shifts app inside of Teams. This would provide additional features like shift swapping, activity lists for each shift etc.
An error occurred while saving the commentAnonymous commented
As a teacher, this is SO necessary. I use Posts in the General channel to update students on the day's agenda. I plan a week in advance and would love to post the week's plans, but not confuse students by having all 5 days show up in their feed at once.