Might be a small one but this has got me stumped

I've been testing how my game looks when played on a phone and it weirdly gets cutoff a bit when played on my phone browser's 'desktop mode'.

Any ideas how to fix this? Is there a setting buried somewhere on itch that I'm missing or a adaptive code anybody knows that I could add to the index file or something? It's not even the kind of thing where you just zoom out with your fingers - this is the max the page will pull out for some reason.

In browser

I've tried upping the Viewport dimensions - which does force the phone's desktop browser window to show the whole thing, but that creates some empty space black bars on the sides and looks a little tacky.