ESP32 SIM 7600 Remote 4G sensor need BT door sensors

Been building a remote 4G remote sensor based on a LILYGO® TTGO T-SIM7600 ESP32 (ESP32-WROVER and SIM7600).

Basically it monitors a remote property, listens for command (MQTT) or direct cell call with a preset code. Has a temp sensor, shock sensor, and a serially attached ESP32Cam which sends a photo when the PIR is triggered.

So looking at adding door sensor that are BT enabled and also keen to look at remote ESP32 cams that can communicate to the T-SIM7600 ESP32.

So my question are these:
Best device with minimal conf to monitor a door? I need it to be BT so a device like this below can it communicate via BT to a ESP32 without a CC2531 stick?
e.g., Tuya Zigbee/Bluetooth Smart Magnetic Door And Window Sensor Record Open/Close Status Alarm Smart Home Security Detector

Best way to have a solar power remote ESP32 cam interface with the base ESP32 T-SIM7600?
e.g., ESP-NOW?