I think you go to your mobile setting > accounts > google > new account ?
That way, google get all your info, mobile numbers, company, version, all your google ids, and your sim numbers.
So google not ask you for mobile verification 🙂 Cause they already have all your info.
I usually make random emails, not abusing the system also, but after few emails, they ask for phone verifications.
Google ko mujhpe bharosa nahi hai 😅