Bed and Breakfast - booking backend calendar integration (resonline)

Hello,

Looking to move away from Wordpress, and SquareSpace is coming highly recommended from others. The website is for a small bed and breakfast business, however I am trying to find out info on displaying calendar bookings.

The backend system in question is called resonline (https://www.resonline.com/) and hooks in to booking.com etc. so people will book in from a well known booking website, and resonline calendar is the source of truth for bookings.

Is there any way to integrate this in to a calendar back on a SquareSpace page? Just reflecting the calendar would be enough, so only needs to read. Of course booking from the SquareSpace site directly in to resonline would be great too, but is less important.

Happy to have the solution involve writing code, but a more plugin friendly way would be preferred.

Thanks in advance for any help!

Lozza.