This is a great question, funny how i stumbled upon it
But i recently saw two things
one, a youtube video that talks about developing an AirBnB App, the guy literally takes you through the whole development - you can check it out here: https://www.youtube.com/watch?v=c_-b_isI4vg&ab_channel=CodeWithAntonio
two, i went down the rabbithole of finding companies to do this for me, you can use TopTal or a.team or Lambdagroup.io and build a team to make you the app - check out their sites