Way to "embed web page"?

Hello, I've made a tool somewhat similar to OTFBM, but with hexagons.
Like this: https://www.tavolarotolante.it/mappaEsa/mappaEsa.php?esax=30&col=black&p1=C.4.red.Bob.1&p2=F.2..Gigi&p3=D.7.purple..2&p4=B.10&img=https://i0.wp.com/2minutetabletop.com/wp-content/uploads/2022/11/Medieval-City-Streets-Night-Exteriors-44x32-1.webp

It produces not an "image" as is OTFBM, but a web page with a svg with a background image.

It would be beautiful if I can "embed" a web page like this in a post.
I know that I can use html tags using [ instead of <, but not managed to use something like an iframe.

Do you think it can be done in some other way?

That's because you're not using HTML with a square bracket. BBCode is a separate syntax that gets converted into HTML, and due to the security concerns, iframes are not usable, nor is there any intention of adding them any time soon. There's just too much room for security problems. The site doesn't even create an SVG as a background, it's just an image embedded on the page. You can download it and upload it to imgur to display here.

Ok, I presumed something like this.
Thank you.

I don't use hexmaps much, but godsdamn if that isn't some great work.