[embedding-shape]

It's not "blocked", the person implementing it just forgo any sort of browser history usage when creating the website/"app", and the entire thing is controlled 100% in their own JS code. I guess author only had their specific mobile use in mind when creating it? Maybe swiping for back/forward works if you view it on the phone?

[Palomides]

you're attributing a lot of intent to the details of a site that is almost certainly 100% AI generated

[embedding-shape]

Still supposedly a human prompting stuff to happen in any case. Not to mention, I think you'd have to prompt against the model to avoid making URL routes in a 100% frontend application, leading me to believe the "missing" page navigation is intentional.