This is perfectly legal for a reason.
Are they monitoring everyone closely? No.
Are they monitoring those running for office, those they find “of interest”, certain key words and phrases, and so on?
CERTAINLY.
AI helps them to sort through the noise; this is the Patriot Act manifest. Companies are eager to comply.
Decades ago, they would have to “wire” your house to monitor you, tapping your phone and the like.
Today, they simply have to notice you, and they can get all of the data they want at will.
If your goal is political and unpopular with the powers that be, using the internet or phone will never be even vaguely secure. The TV is watching you… and the fridge and the washing machine and so on.
If you think your device is secure; that very same device is guaranteed to be insecure. They are supremely interested in those who want “secret” communications.