I would like to see a time limit for facility to book you. If your not booked within 3 hours or a reasonable time after putting in request. Then when a facility press accept you need to get a message that says can you still do this shift.
Example:
Shift open 1/3/23 6am-6pm
Requested it 1/1/23
Facility accepts you on 1/2/23 for shift. It should ask do I still want this shift before being scheduled.