In April 2020, combined security information registration experience for registering both multifactor authentication (MFA) and self-service password reset (SSPR) was released for you to opt in. Beginning 1 October 2022, we will be making the new combined security information registration experience the default for all tenants. This change does not impact you if your tenant was created after 15th August 2020 or your tenant is in the China region.
Learn more: Combined registration for SSPR and Azure AD Multi-Factor Authentication - Azure Active Directory