Hi @radu.amihaesei,
Welcome to the Auth0 Community!
That’s correct. OTP MFA should only be available under the Professional or Enterprise Plans. If you attempt to enable OTP MFA with the free plan, you will see warning banners about requiring an upgraded subscription plan:
While you are not completely restricted from enabling MFA, we recommend upgrading your Auth0 subscription plan to continue using MFA without disruption. Additionally, if you check your quota utilization on the Auth0 Support Center, you will see that MFA features are not included in the free subscription plan.
Let me know if you have any questions.
Cheers,
Rueben