G5 pro hub not being recognized

Will this have to be close to the primary thread router in order to get initialized as a border router?

Hey, what exactly do you mean by “not recognized”? If you’re just trying to get the Aqara hub to join your existing Thread network, they don’t need to be right next to each other. As long as all Thread Border Routers are on the same local network (Wi-Fi/LAN) and can see each other via mDNS, it should work fine!