Can someone fill me in as to why they can’t just store the password using something like bcrypt? Okta uses bcrypt to store passwords. Are there any techniques

Can someone fill me in as to why they can’t just store the password using something like bcrypt? Okta uses bcrypt to store passwords. Are there any techniques for identity providers to authenticate people without storing or transmitting the users password to them? There are several! WebAuthn is one of the better methods to do this.