That requires on-device AI to avoid suspission from mobile data usage and OS admin rights to hide the <microphone in use> light, or a “excuse” to why its on.

Even if you cant name them, go ahead and let others, connect to tor, create an account with a burner email service and post their insites on the matter.

Dont forget, they can hold all the physical buttons at once until the screen goes black, and head to the local library

Also, try out a de-googled pixel somtime (graphine,lineageos,etc…)