Hello @hdowthwaite,
I hope this message finds you well.
We kindly request temporary FTP access to your staging website in order to further investigate and assist with the issue you are experiencing.
Additionally, please note that the popup layout is currently styled according to the default layout settings for the single product page, as configured under Theme Options → WooCommerce → Single Product. Unfortunately, we are unable to modify these settings at the moment due to some JavaScript errors, as shown in the following screenshot: https://prnt.sc/wM5Jh4l9aqZl
We appreciate your cooperation and look forward to resolving this matter promptly.
Best regards,
Jack Richardson
The 8Theme Team