I like to suggest a different microphone dot icon for Voice Control. I had customized Voice Control to turn on a Flashlight. This caused confusion with the orange dot being switched on constantly.
I made an error in sending a security vulnerability to Apple Security about the orange dot microphone in always ON mode when iPhone is unlocked.
For help with the microphone, please post in the Apple Support Community. The Apple Developer Forums are for questions about APIs and features intended specifically for developers.