The WM1302 raspberry Pi hat has two u.FL connectors to attach attennas.
One is labelled “RF10” on the WM1302 mini PCIe board, and the other is labelled “ANT” on the hat.
Which one is for is GPS antenna, and which one is for the LoRa antenna?
According at wiring diagram listed on that page https://www.seeedstudio.com/WM1302-Pi-Hat-p-4897.html it looks like the GPS chipset is on the hat so antenna connector on hat is for GPS, the one on Lora board is for Lora antenna zhich makes sense 