Hello @David12738
I also have a 2 bedroom apartment and agree with @Basha0. I too have a fixed price for the whole unit and always have that second bedroom available. I often have just 2 people reserving the place and never assume that they will share the same bedroom. They appreciate having that extra space be it to sleep in or just to store their things.
Having just 2 people instead of 4 (max occupancy) is less wear and tear generally even if there is the chance that I have an extra load of linens and towels to do.
I feel it's less hassle doing it this way and it is marketed as a 2 bed apartment on Airbnb and certainly don't want to enter into sleeping arrangements with my guests prior to booking.
My very first guests were a couple and I assumed that the second bedroom wouldn't be used (naive then😉) but it was and figured that they chose to stay because it did offer that second bedroom otherwise they would have bypassed my apartment and looked for a 1 bed.