I use a motorola moto z4 smartphone, and the screen is filled in an odd fashion. I've seen the screen completely filled on other phones that have the same form factor, like the iPhone 11. I'd appreciate this, and since the dot on the top (think of the 'lip' on the new iPhones) is really small, I think the game could be played in full screen.

To explain more in depth-- the screen is only as wide as the distance from the bottom of the front-facing camera to around where the top of the menu, back, and home buttons would be on the screen, even though they're hidden while the app is open.

I can only assume that this issue is reproducible only on phones which have this issue.

TL;DR: The game doesn't fill the screen fully, despite observations of it doing so on other devices of similar screen size.