> Our investigators and several experts concluded with high confidence that the Saudis had access to Bezos’ phone, and gained private information. As of today, it is unclear to what degree, if any, AMI was aware of the details.

Note the words "Had access to Bezos' phone". E2E encryption means bugger all when someone has access to one end. There's other comments in the article that give the impression Bezos' phone was compromised.

Wait. Even if you have access to the device how do you get app-to-app access of the underlying texts unless there is a hack unknown to Apple. I know there are barriers Apple has built in where developers cannot access the text messages because of many obvious reasons for abuse. Perhaps Pegasus knows of a "0 day" or multiple and use this? However, E2E encryption PLUS Apples security model around text messaging in iOS should prevent it.