Android Authority: What is Pegasus and how is it used for spying?.
[1]https://www.androidauthority.com/pegasus-spyware-1646458

   "In short, Pegasus is commercial spyware. Unlike the malware used by
   cybercriminals to make money by stealing from and cheating their
   victims, Pegasus is designed solely for spying. Once it has secretly
   infected a smartphone (Android or iOS), it can turn it into a
   fully-fledged surveillance device. SMS messages, emails, WhatsApp
   messages, iMessages, and more, are all open for reading and copying. It
   can record incoming and outgoing calls, as well as steal all the photos
   on the device. Plus it can activate the microphone and/or the camera
   and record what is being said. When you combine that with the potential
   to access past and present location data, it is clear that those
   listening at the other end know almost everything there is to know
   about anyone that is targeted."

References

   1. https://www.androidauthority.com/pegasus-spyware-1646458