How is that possible? As best as I can tell, your location is tracked at all times, the OS has telemetry built-in, and lots of telemetry data is going out with every app. Also how do you audit it?
I'm sure my phone is leaking way more data than an Alexa.
There are options. Personally I run Graphene OS on a Pixel 3a. I have no proprietary software (with exception to binary firmware blobs for the modem and other low-level components) installed on my device. All apps are sourced from F-Droid. I've measured very low telemetry data from my device.
If you are not a famous person probably. If the are a target of a government or invested body. It doesn’t matter, they have a depth of zero days they can use.
I'm sure my phone is leaking way more data than an Alexa.