The #encryption topic in #InstantMesaging is popular again recently. As usual there's a lot of misunderstanding and little discussion of a #ThreatModel when giving recommendations.
If the private key is backed up with Apple or Google from your phone, then your messages may as well not be encrypted I've again seen this indirectly with contacts changing phones and their keys are the same as on their old device. Due to automatic backups I guess.
Doesn't matter if it's #WhatsApp, #Signal or #XMPP