My iPhone 7 will not record audio

Dear maine,

your issue could be management policy related (if for example your device is managed by an organization, in this case you can't solve it) or privacy related.

In the second case you can solve it through Control access to hardware features on iPhone - Apple Supporthttps://support.apple.com › ios

It means that some settings are managed by a profile installed on the phone by your organization, and you can't change these settings without deleting this profile.

To see if your phone is managed by a profile, please go through Settings-->General-->Device Management.

If there's a profile in it, click on it and then press "restrictions". There you'll find all prohibited functions by the profile.