From experience, with facial scan or fingerprint scan available on Apple, 3rd party app require it. E.g. okta MFA login, for those with apple phones, using face scan can be forced. I know you are free to decline and free to quit the company requiring it, but just like any new data set, you soon won't be able to live without providing it.

Remember when a social security number was introduced, gov promised it wouldn't be used as a identification number for any other purpose . Forward 50 years and now you can't do anything without it.