Hi @priyanka kumari , unfortunately this cannot be changed as it is an iOS feature regarding user security. The only thing you can change here is the application name. Other users have encountered this issue and have found a possible workaround, but you'll need to change your authentication method: https://stackoverflow.com/questions/57472927/b2c-popup-on-ios-my-app-wants-to-use-b2clogin-com-to-sign-in
If this answer helped you please mark it as "Verified" so other users may reference it.
Thank you,
James