Wemos R32 // Where is Serial1?

Hi - I have a Wemos D1 R32 here and I'm trying to find out which pins to use for RX/TX communication.

I can't find any data for it, and there's no software serial library available for it either.

I'm using Serial to print data in the monitor, but I also have a Nextion screen I'd like to connect to Serial1

e: It seems to be working with this in the setup:

Serial1.begin(9600,SERIAL_8N1,13,12);

The last two are the pins - they seem to be limited to 9600 baud rate though, unless that's my Nextion screen being a pansy.

Can you post clickable links to the technical specs of the Wemos board and the display please.

Is this it? If so, the schematic is here.

Maybe this will help.