For what it’s worth, I believe the significant locations are not provide to Apple and are only available directly in your device, so without access to the unlocked phone, they are private.
Someone can correct me if I’m wrong on that.
But if you want to disable, this article explains how.
TexAggie90 t1_iqx9u9r wrote
Reply to comment by [deleted] in Secret function on Amazon Alexa helped me bust my cheating boyfriend by penone_cary
For what it’s worth, I believe the significant locations are not provide to Apple and are only available directly in your device, so without access to the unlocked phone, they are private.
Someone can correct me if I’m wrong on that.
But if you want to disable, this article explains how.