They have a GA4 integration: [https://help.acuityscheduling.com/hc/en-us/articles/16676924424589-Using-custom-conversion-tracking-with-Acuity-Scheduling#gref](https://help.acuityscheduling.com/hc/en-us/articles/16676924424589-Using-custom-conversion-tracking-with-Acuity-Scheduling#gref)

Import the conversion/key events, however defined, from GA4 to Google Ads.

You can also set it up as a server side snippet by injecting the Google Ads conversion code (see: https://help.acuityscheduling.com/hc/en-us/articles/16676924424589-Using-custom-conversion-tracking-with-Acuity-Scheduling). I would do both and make one secondary.