If you have turned off microphone access for some apps, you will need to enable it again if you want those apps to use the microphone. Here's how to do it:
- Open the Settings app on your iPhone.
- Scroll down and tap on "Privacy."
- Tap on "Microphone."
- You should see a list of all the apps that have requested microphone access. Look for the app you want to grant access to and toggle the switch to the right to enable it.
- If the app you're looking for is not on the list, make sure it is updated to the latest version and has requested microphone access. You can also try reinstalling the app.
If you are still unable to turn on microphone access for individual apps, you can try resetting your privacy settings to default. To do this, go to Settings > General > Reset > Reset Privacy Settings. This will reset all privacy settings to their default values, and you will need to grant access to all apps again. However, it should fix any issues preventing you from turning on microphone access for individual apps.