@Emma4460
Airbnb's algorithm decides the parameters for search results and understands that a listing your size would not normally be booked by 2 guests.
@Mike-And-Jane0 have an excellent idea in that you can create multiple listings:
Parent: entire listing
Child A: 2 bedorms
Child B: 3 bedrooms
Then price the listings accordingly and sync them properly. Child A and Child B will appear in more searches for less guests. Be sure you clearly describe that unused bedrooms/bathrooms will be locked off in the child listings and be sure you have an efficient way to do that. Many Hosts use digital keypad locks for bedrooms and lock off bathrooms not included in the child listings. The front door should have a smart lock.
If doing this, turn on professional hosting tools and use the multicalendar as it's easier to track the listings in one calendar view. Multicalendar only available on the desktop though; not the App.
Search the CC for numerous posts on how to properly create and market multiple listings for the same property.