Alex wants to do Facebook live by connecting a GoPro to his iPad. Leo recommends considering buying the MEVO camera. It is designed to stream live directly to Facebook, YouTube, etc. in 4K. If he streams in 1080p, it's like having 4 cameras at once. If going with the GoPro, then he'll need to use GoPro's software to do it. The challenge will be inputting the audio. The chatroom says he can use a USB-C mic adapter into the GoPro. GoPro has a 3.5mm adapter here.
The Blackmagic ATEM Mini is another option, and it's supported by the iPad.