Scheduled auto-post messages/notifications on channels
Our teams posts routine updates/notifications on our channel (mainly posting who is the POC for the team on that day). It would be nice if we can schedule a specific message to be posted on specific timings (or even better if customizable messages for different timings) for automation.

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.