Every airline has this. It fluctuates with the airlines needs and what’s been dropped or unassigned due to lack of staff. Given the current market where nearly (if not all of them) all regionals have stopped hiring FO there likely isn’t much if any open time flying being posted and any that is posted gets snatched up quickly. Most regionals at this point have an excess amount of FOs and a lot aren’t picking up extra time because there is no extra time to be had.