Hello @GuestGuivenchi
Thank you for reaching out. I would like to confirm that Azure AD has predefined Password Policy for all Azure AD Tenants which cannot be modified. Hence there is no Azure AD or Microsoft Graph PowerShell command available to modify these settings.
For more details you can refer following article: https://learn.microsoft.com/en-us/azure/active-directory/authentication/concept-sspr-policy
I hope this helps and hence would request you to please "Accept the answer" if the information helped you. This will help us and others in the community as well.