Again - how do I link my AirBnB calendar to see on my iPhone?

I had no trouble, on multiple AirBnB pages it asks you to download the AirBnB ap. I think especially the “Dashboard” page. You install that ap on your phone and when you double-click it ALL the info on your account is there. At the bottom of the page there is a link that says calendar.
I am terribly computer un-literate, but I was able to do this. It became a necessity to do this because a message saying I had a request for a reservation would come in, but when I tried to answer it I got a message saying I needed to download the ap.
An easy way to get a message to download the ap would be to try to answer a message to a guest on your phone without the ap and the link to downloading the ap should appear.