Hi,
Currently, it is not possible to write code that would adjust the height of the HTML iFrame element depending on the dynamic content is being pulled into it.
You can try to see if the website that you are pulling the information from can allow you to make some API calls from your Wix site to pull the information in to your site without the use of the iFrame. If you would like to try this method, take a look at the tutorial here to see how to use the fetch API to accomplish this.
Best regards,
Edward | Corvid Team