Connect multiple UART devices

I build a prototype of the small device which has two modules (GPS - ATGM336H and SIM800L modules). Both have RX and TX connections. As I understood, Seeeduino has only 1 serial port on 6 and 7 outputs. How can I connect and make it work together? Is there any way to add more UART ports to my XIAO?
Also, I want to use LoRa module as well in another version. And it also works through UART. Thanks!