Hello @AzureUser-9588
Thank you for reaching out. I would like to confirm that per-user MFA is available for Azure AD Free tenants. You can validate these details using following documents:
Enable per-user Azure AD Multi-Factor Authentication to secure sign-in events
Azure Active Directory plans and pricing
I hope this helps.
----------
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.