Problems in airbn and cleaning older iPhones

Besides that for me it is very important to be able to make reservations for three days for example in Airbnb appeared a week and I can not because it is not enabled in Hotelgest also consider it very important that the cleaning ladies can see the availability with iPhones that are not the latest technology, since they can not afford the privilege of spending on expensive phones, only allowed from the iPhone 11, would be very helpful