This should cover you, keep in mind it seems it is only for usb-c only iPads. It also requires a dongle or two and may not be the cleanest looking of setups. https://9to5mac.com/2023/08/05/how-to-use-your-ipad-as-a-game-console-display-video/

Should also allow the use of iPads as an external monitor for game consoles and the like. I’ve tried it out in beta and it seems to work like a charm so far.