Helping friend who's admin of little webpage for car company.
Site itself is non responsive and made with wysiwyg only.

Owner of the company got external service that provided some widget etc. order database for the site.
One thing was .js popup. Inserted to site with iframe.
It works great on desktop and in desktop mode for mobile but gets messed up in mobile.
Cant change meta viewport (that woild fix the issue) for the site since its old and not made for responsiveness.
I've tried to figure out solutions to overdrive the popup to work in 'desktop' mode in all viewports. It launches with 20s delay and does own css properties then.
With ai help i've tried to do jscripts that would force it to desk mode but no luck so far.
Is it possible to force the iframe think its on desktop always or something?
Any suggestions?