AT command unknown in the arduino IDE environment

**Describe your question or issue**
A clear and concise description of the problem you're facing and what you'd like help with.
TINY_GSM_MODEM_SIM800 Library one of it's AT commands have been denied in the binary configuration environment "they say it's an undefined character. how can we go about it'
AT+CBC, Inquire charging status and remaining battery capacity.(it's the AT command needed to be defined)
**Environment**
Arduino IDE
This information is all important; it's hard to help without a complete set of answers.

- Version of Fimrware being used: Rev C
- Version of Arduino IDE being used:Arduino 1.8.20