I suspected for a long time that they are doing the same on Android. There must be a very small mechanical part in my phone's camera (probably the lens when it

I suspected for a long time that they are doing the same on Android. There must be a very small mechanical part in my phone's camera (probably the lens when it focuses) that makes a subtle noise when activated. I noticed the noise was present every few minutes when I browsed on Instagram, but only when I forgot to turn off camera permission. It is creepy, no matter what the reason behind this.