[bjcy]

If you're referring to the Lightning to Digital AV Adapter, unfortunately it doesn't do raw HDMI output: https://panic.com/blog/the-lightning-digital-av-adapter-surp...

My assumption is that the lag and artifacts makes it a non-starter for the average gamer.

[stetrain]

The newer iPad Pro has a native USB-C output that supports 4K 60hz with an HDMI adapter.

https://www.apple.com/shop/product/MUF82AM/A/usb-c-digital-a...