can you actually "opt out" of that number being used or is the spokesperson just saying "we don't get your number via this method if you never give it to us via

can you actually "opt out" of that number being used or is the spokesperson just saying "we don't get your number via this method if you never give it to us via this method" I.e. if you switch from using a 2FA phone number to using the app do they stop using that phone number in your facebook profile? And your shadow profile?