The poster is right, it's very unlikely that WA has been backdoored/cracked, and it seems obvious why.
A backdoor to the world's largest messaging app would be extremely valuable: while it can exist, it's unlikely that it'd be so widely available the UAE police can use it for such insignificant cases. And because of its value, no one with access to it (the US, the UAE, Meta) would want it to become public knowledge through such an insignificant case, because everyone they really want to spy on would switch to Signal in a second.
It’s weird that the notification backdoor never gets talked about, but your Whatsapp messages are decrypted in plain sight when the text content is shipped through the notification services. This is mentioned always for Signal but Whatsapp always gets a pass even though it’s a way more malicious company and indeed probably using that hole to profile/track it’s users.
The only response is “oh no Whatsapp cant leak anything the security model of how chat messages are backed up is a-okay!”