Hi @Liz7285
Yes, it’s entirely possible to synchronize your Airbnb calendars as you’ve described.
Listing 1
Listing 2
Listing 3 ( Entire property Listing 1 + Listing 2)
If Listing A or B is booked, then Listing C should be blocked.
If Listing C is booked, then Listings A and B should be blocked.
Listings A and B should not block each other they remain independently bookable.
It requires careful manual setup using iCal links.