Here is my site Read-Only: LINK
(how to share your site Read-Only link)
Our site was embedded in their platform for a long time and then for some reason it broke. Is it because we are moving to an Ecommerce site?
Yes. ECom sites have a stricter security setup, e.g. https is required, iframe embedding changes etc.
It’s for the security of your users, since a containing site could potentially hijaak clicks and keystrokes, capture your users CC info, etc.
It’s possible to change those headers with a reverse proxy, but they’re there for your protection.