@Ken2238
The booking window (not "availibility window") useally works OK.
Your booking window is probably set to 12 months, as your listing shows availibility to end of March 2022. (so i guest can not book for june 2022 now, as dates can not be selected.)
BTW If you manually make/made dates available in the calender beyond the booking window, they stay available (so not blocked by the booking window in future).