How do I give app access to certain things like photos, camera, etc. on iPad 5th gen?

Hello. I use an iPad Air (5th gen), version 18.5. I have been trying to give apps like Messenger and Google access to certain things (Messenger: Camera and Microphone, Google: Photos [to save photos directly]) and I just can’t. The apps have not requested for access (that’s what my settings app has stated), and I can’t figure out how to give access if the apps haven’t requested it. I’ll appreciate any info on how to give access to apps in cases like these.

[Re-Titled by Moderator]

Original Title: how to give apps access to things like photos, camer, etc.