It is not necessarily about integrating Airbnb solely it is about integrating the iCal link data. Airbnb is the example of a use case.
Airbnb & VRBO both give you pre build links in your account and you can place link in:
Your calander (gmail/outlook)
Other app that accept iCal links
From a business operations perspective:
Step1: upload your Airbnb Ical link
Step2: Hit submit and new rows are added based on iCal events
Step3:view updated Glide calendar