🙃 There might be a few exceptions.

Is there a service that can’t be used without a phone number and has no alternative?

Avoid using services that ask for your phone number, for your own good.

privacy.resistFingerprinting Turning it on provides privacy, yes, but it makes it unusable to use dark mode or even the “Dark Reader” addon.

My advice to you is not to overdo the secrecy, it should not be a problem for the people you do business with to see your face.