There is a way to do it. You will have to create a domain that will allow HTTPS (Vercel is an example)  host your MM code on the HTTPS site.  On wix create a HTTPS iframe, and embed the site that host your MM code.   I did it for a project that was on a Wix site. In this instance, I used Bubble's Web3/MM functionality and embedded it to this site: www.happylittleHairdos.com