Open Settings
Tap Privacy & Security
Tap Microphone
Turn off microphone access for the apps you want to block
Go to Settings
Tap Screen Time
Tap Content & Privacy Restrictions
Turn on Content & Privacy Restrictions
Tap Privacy
Tap Microphone
Set allowed apps to off if available
Turn off Siri and Dictation if you want to reduce microphone use
Go to Settings
Tap Siri & Search
Turn off Listen for “Hey Siri”
Turn off Press Side Button for Siri
Go to Settings
Tap General
Tap Keyboard
Turn off Enable Dictation
Use a hardware privacy cover or microphone blocker if you want physical blocking
Disconnect wired headsets or accessories with microphones when not in use
Restart the iPhone after changing settings if needed