Here is a gadget designed for capturing mobile games. The EZCast CatchU is a game capture box with 4K@60 pass-through capability. It can record to a USB storage devices and supports OBS Studio, Xsplit, and Potplayer. You can also attach your microphone and camera for in-game commentary and interaction with fans.
This box is compatible with PS5, Xbox One, Nintendo Switch, and PCs. It is ready for 1080p60 streaming. It has a plug & play design. You can find out more about it here.