Here's an article on testing if your phone listening to you (yes e.g. Siri) and if that data is being used to target someone (this is the real question).
TLDR is 1 of 3 seem to prove phone is listening and the data collected is used to target ads.
Is my phone listening to me? How to stop it | NordVPN
But there are other articles that says no. There are other articles that indicate other smart devices (e.g. TVs) can also listen.