This application only works on Edge and Chrome on an iPad. Safari is currently not supported.
Please ensure the HDMI capture card is connected to the iPad, and the USB-C to HDMI adapter is connected to your laptop. Use an HDMI cable to link the capture card and the adapter.
This is what I used to make it work, and you may need to modify the hardware for your type of iPad.
Due to my company not allowing additional software on the iPad, I built this web app that allows me to extend my laptop display to my iPad while I am on the road. Because of the way this works, I can connect multiple iPads if needed for additional screens.