Hi @Owane-David0 I hope you are well!
You need to create 4 listings:
1- all your 3 rooms combined, let's call them rooms a, b and c (as you have your listing at the moment, but priced for the whole unit)
2- room a priced for 2 guests
3-room b priced for 2 guests
4- room c priced for 2 guests
You will need to link the calendars together to prevent booking issues.
https://www.airbnb.co.uk/help/article/289/how-do-i-list-multiple-rooms
https://www.airbnb.co.uk/help/article/1864/how-do-i-link-airbnb-calendars-for-multiple-listings
Paul 🙂