Hi @Oswaldo Jaime , the only way to do this currently is by using the Outlook client app. This document details how you can customize MFA through the app. If you're not currently using it, you can easily add the Outlook Cloud App to your conditional access policy. Please let me know if you have any questions!
If this answer helped you, please mark it at "Verified" so other users may reference it.
Thank you,
James