iframe display automatically responsive on mobile and tablet [closed]

I created a website ( one page ) with Framer using a fixed desktop layout (1200 px wide). I embed it into a page of another website ( wordPress - Html - Wix - Shopify ) using an iframe. On a desktop, everything displays correctly, but on a mobile and a tablet, the content does not adapt to the screen.

I want to keep a single 1200 px desktop version (without adding any additional breakpoints in Framer).

How can I make the iframe display automatically responsive on mobile and tablet?