Some carriers (like Verizon, Jio, or Airtel) block USSD codes that access engineering menus. They route *#*# sequences to their own billing servers. Put your phone in Airplane Mode , turn on Wi-Fi, then try the code. If the code works in Airplane mode, your carrier is the blocker.
On the NOTHING Phone (1), which runs on Nothing OS, these codes can range from universal Android codes (that work on almost any device) to specific codes tailored for the Qualcomm Snapdragon processor that powers the device. How to Use Secret Codes on NOTHING Phone -1-