This might be something that is not done in all states. I’ve never been asked this question.
I’m in Texas and I’ve had auto insurance here for about 50 years. I’ve never been asked to disclose how many miles I drive per year.
Guess if they WOULD ask, perhaps my rates would be lower. I bought a new 2001 auto 9 years ago and it hasn’t reached 15,000 yet!! That’s only about 1700 miles a year! lol