Communication of XIAO nRF52840 (Sense) & XIAO ESP32C3

I have tried to send variables from my XIAO Sense to my ESP32C3 but can’t find a communication protocol to do so successfully. I have tried various SPI, I2C, and UART codes and so far, the best-case scenario is reading ones and zeros. Does anyone know how to pass doubles and integers from the XIAO Sense to the XIAO ESP32C3?