Our Profile shows a picture of the two of us, for q couple reasons, but then says “Hi, I’m Ken” and in the body the pronoun used is “we”. We aren’t married, it’s her house, but I do the vast majority of the Airbnb work and split the money. We each have a profile for trip booking, but mine is the one for hosting.
I think every married couple we’ve had book with us has a “joint” account. I also think it doesn’t matter. The thing you as a host need to know is how many people will be coming.