Doesn't work on my phone on this site—it's detecting the viewport size, and even in landscape with desktop page mode turned on the site refuses to show anything.

iOS safari requesting desktop site no luck. But Orion from Kagi shows the desktop version.

Vivaldi also lets you do this

Tried that on some service promoted here yesterday, they still figured out I was on Android and kept blocking me. Happens rather often, actually.

I find it convenient to do both some programming and exploring documentation and new technologies on a tablet, and just discard those that don't allow me to. If you're selling to computer professionals you shouldn't try to preempt the expected problem of customers complaining that your services don't render right on a small iPhone.