Thank you for posting this in Microsoft Q&A.
As I understand you want users to be prompted to enter their credentials every time they try to access the application.
You will have to update your application code to include "ForceAuthn" parameter to "True" in the authentication request. This will allow Azure AD to prompt users to enter there credentials every time they try to access the application. In this process of the credential prompt, users can select or enter any other account as well.
You can also refer below article to get more information regarding this.
https://learn.microsoft.com/en-us/entra/identity-platform/single-sign-on-saml-protocol
Let me know if you have any further questions.
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