Google Analytics - Iframe Tracking

Hi, I have a website which uses a number of iframes (acuity scheduling) to book customer appointments. I am wanting to better use Analytics and so I need a solution to link the user acquisition data from the website to that of the iframe. Both the domain and the iframe are set up for analytics but there is no sharing of data as yet.

I'm looking for someone to create code to input into my website to allow user acquisition data to be passed through to the iframe and therefore visible in analytics. Any other suggestions welcome! Thanks