Iphone 12 mini microphone not working on apps after IOS4.6

Hello, Aymeann. Thank you for posting your situation to the Apple Support Communities. We understand that being able to use your microphones in all apps is important to you, and we’re happy to help you research a solution. 

From what we gather, you are noticing these issues only when using certain apps with your iPhone 12. In a situation like this, there are several troubleshooting steps that we’d suggest starting with. 

First, we’d like to be sure that your apps are updated to the latest versions to match the iOS update that you recently installed. You can find instructions for updating your installed apps in the following Apple Support article: 

How to manually update apps on your Apple device - Apple Support

We’d also suggest completing these steps if you are noticing an issue when using the microphones on your iPhone: 

If the microphones on your iPhone aren't working - Apple Support

Finally, if you’re still unable to access the microphone with these apps. We’d suggest checking the Privacy settings on your device to confirm that each app has permission to use these hardware features of your device. You can find instructions for this step in the following article: 

Control access to hardware features on iPhone - Apple Support

We hope that this information allows you to start using the microphones again with these apps. Please let us know if you have any other questions. 

Cheers!