As usual, sharp @Ann72 asked the most relevant question - 'Is the new owner intending to continue to host and use the property the same way?'. Meaning you are selling the place + the future revenue of its bookings?
IF so, then it stands to reason the transition may require your good will and further help making the transition that much smoother for the new owners. Also, the 'value' of anything lies greatly on the personality of its present owner, so I would think the new owners would want some good-will future involvement by the previous owner. IF you want no further participation with hosting or its responsibilities, then the sale should be 'As Is', with no further participation on your part. Airbnb is a whole other matter then, technically.
I may be facing the same thing myself soon; I have an offer on the table, and have 50+ lucrative reservations from Nov.1st 2020 till 2021. And I am still not ready mentally to start host back again, so a bit in suspended state. IF I sell, I am offering to the new owner to stay involved as a matter of good will and good business for a two-year period.
Exciting times indeed@Rachael171. I love change, is what keeps us alert.