Can’t access to microphone on apps on this iPad

Hello bashae299,

Welcome to Apple Support Communities. 

We understand that you’re not able to access the microphone on apps. We are happy to help.

These steps will help show you which app(s) you have allowed access to your microphone. If there's a particular app that you want to access the microphone, you will need to c heck the settings of that app to enable the microphone. Please try the steps here: About privacy and Location Services in iOS and iPadOS - Apple Support

"Privacy settings

Privacy settings in iOS and iPadOS help give you control over which apps have access to information stored on your device. For example, you can allow a social-networking app to use your camera, so you can take and upload pictures to that app. You can also grant access to your contacts, so a messaging app can find any friends that are already using the same app.

In Settings > Privacy, you can see which apps you have allowed to access certain information, as well as grant or revoke any future access. This includes access to:

• Location Services
• Contacts
• Calendars
• Reminders
• Photos
• Bluetooth
• Microphone
• Speech Recognition
• Camera
• Health
• HomeKit
• Media & Apple Music
• Research
• Files and Folders
• Motion & Fitness

On your device, you can select a type of data from this list to see which apps have asked for permission to use that data. An app won't appear on the list until it asks permission to use your data. You can add or remove permission from any app that has asked for access to data. An app can use the data type in the setting only if you have given the app permission. 

If you sign in to iCloud, apps are granted access by default to iCloud Drive. You can view and manage apps that are allowed to use iCloud under iCloud in Settings as well. 

If you allow third-party apps or websites to use your data or your current location, you're subject to their terms, privacy policies, and practices. You should review the terms, privacy policies, and practices of the apps and websites to understand how they use your location and other information. Information that Apple collects will be treated in accordance with Apple's Privacy Policy."

Let us know if you have further questions.

Take care.