Meshtastic programmed MCU with an arduino programm operating at the same time?

[Gilberto117mx]

Is there a method to program a Meshtastic device (XIAO nRF52840, XIAO ESP32S3) to send automated messages?

I have created a PCB circuit that has a XIAO ESP32S3, and a quectel L76k (GPS module) I want it to receive GPS locations on a fixed schedule and send them via Meshtastic.

How can i programm that logic in the same MCU that holds the Mehstastic Firmware?
I have already the logic in an arduino program, but i do not know how to implement it in the same MCU that has the Meshtastic flashed.

The ESP32S3 will be in the left side and the Quectel L76K in the right side.