You must be ignorant of how these agencies work. All they want is plausible deniability. The spy agencies have all technology needed to access any phone. For example, it is widely known that Israel's agencies have the ability to enter any phone, iOS or Android, and get the information they want. They are now OPENLY using this technology to track corona virus cases:

https://www.cnn.com/2020/03/18/tech/israel-coronavirus-techn...

https://www.timesofisrael.com/israeli-tech-company-says-it-c...