Available GPIO pins on CYD (version 3 w/ 2 USB ports)

I have version 3 of the CYD with 2 USB ports and wonder which ports / pins I can use for software UART (gps module) and I2C (temperature / humidity module) . I have the feeling that there is only GPIO35 available while I need four pins.
BTW: the CYD is going to be a mobile device w/o connection to home assistant.

Can it be that a second ESP32 (for having the required GPIO pins) and ESPNOW for the communication is the solution?