Although the graphics part is weird: 720 x 1680 @ 60 Hz

Vertical, and a bit longer than 720p? It's probably some standard size in some industry or type of device, but caught me off guard...

That display orientation and resolution is likely a carry-over from a phone project. Was probably cheap and easy for them to integrate an existing IP block from an older phone SOC.

1680 x 720 is resolution for ultrawide 21:9 aspect ratio