@Brit1407
I doubt Airbnb will make it easier to see bookings from another platform on theirs. They formerly had the ability to read notes directly on the calendar but removed that functionality with a software release awhile back. Despite numerous requests from Hosts to restore Notes to the calendar view directly, I doubt that functionality will return either.
Airbnb says the calendar syncs only every 2hours automatically (unless using a channel manager). You can manually cause it to refresh sooner. Many Hosts do a manual refresh and double check to make sure the calendars are synced after every booking. Vrbo data is only imported for one year out (Airbnb says they export data for 2yrs, but can't control what other platforms allow them to import). This means if you have an Airbnb reservation 2yrs out, it won't sync with Vrbo apparently; this can cause a double booking if you open your Airbnb calendar for more than one year.
Airbnb Calendar Sync
https://www.airbnb.com/help/article/99