Selling rooms with adjusted occupancy levels

1 . Do I need to ask Booking.com team to set up Rate level occupancy so I can sell a unit at two different occupancies?  For example my standard unit (villa) accommodates 5 persons but I have an extra beds policy to enable a villa to hold 6 beds if requested.     I have set up my standard units with maximum occupancy 5 persons. I have also set up pricing for my entirety villa price 5 persons and an Extra bed price per night as an adder ?   How do I get a unit to show up with max 6 persons (Bear in mind I am in Turkey and I cannot view my property as a customer to check it.)

So question 2. is "Must I create a new room type echoing my standard unit with a max occupancy of 6 persons as well?"  Guidance needed.  Thanks.