As I said, if you have any evidence to suggest that Facebook can decrypt it, I’d love to see it. It’s common knowledge that they use the Signal protocol, which to my interpretation means the encryption keys are generated and stored by the users’ devices, not accessible to FB.
it’s encrypted, but it’s facebook’s own encryption. They can decrypt it whenever they want. And facebook owned services are constantly getting hacked.
As for pictures being saved by other things on your device, get rid of those other things and replace them with proton drive
As I said, if you have any evidence to suggest that Facebook can decrypt it, I’d love to see it. It’s common knowledge that they use the Signal protocol, which to my interpretation means the encryption keys are generated and stored by the users’ devices, not accessible to FB.