Please consider integrate check list 📃 functionality.
In each item can assign who or which group mark it as done. Example, I create a check list of 5 items, each item can be marked done by specific members. Set each item send alert automatically by hours, days, weeks, month, years or custom, to that member, so that member will alert to review if that item ready to be marked as done or not. If that item has been marked as done, stop sending alert, but there show a message say: x member has x item mark as done, Something like the message of a post modified.