Online Booking Configuration
How to configure your GA4 for use with the Online Booking

How to integrate the online booking system with your website
You should have no problems with adding on-line booking buttons to your web site using the instructions found here...

Reference: on-line booking administration area explained!
This article explains the options available to you that are found in your members area related to the on-line booking system.

How to set up the on-line booking system in GA3
This article shows how to set up the on-line booking system to synchronise with GA3 to show your bookings in the appointments section.