Solved it. Im using the Date Time picker now. I verify the chosen start time to be in increments of 30 min by dividing the date time by 30 and formatting for only the seconds BUT the lag is allowing the booking button to appear while it divides… If its not “00” they haven’t chosen the right start time. Durations are in 1 hour increments.
I believe this gives a true date/time to filter but again, I have no way to make the booking button instantly appear or disappear if the time is not #:00 or #:30