Hi @Jatin Dave,
Based on your query, here is my understanding: You would like to have login page on screen of the app instead of redirecting to the browser.
Azure AD B2C supports system default browser and embedded view of the login page. System browser could be used and recommended if you would like to remember the username of the users who have logged in before.
Note: Some identity providers, such as Google, don't support an embedded view experience.
Please go through the following document in order to use embedded view: Embedded web view experience.
I hope this information is helpful. Please feel free to reach out if you have any further questions.