Denied permissions actions on Ios or Android

[MuhammadFaisalIchal]

So I use the [this library to take photos via Camera and also a Library where the form can be validated, whether it has been filled in or not.

But there is a problem if I refuse permission to access the two functions mentioned above, then the Camera and Library buttons cannot be accessed again AND there is no information on how the User can fix this, by directing them to Settings > Permissions.

What are the alternatives?
I've read the documentation from the library, but nothing about this..
I've also tried to implement Permission Handler, but I don't know how and where to put it.

Please help, thank you