Hi @milan.milojic,
Welcome to the Auth0 Community!
Unfortunately, this is not possible with the New Universal Login Experience. However, it is possible with the Classic Universal Login Experience.
To learn more about how to configure the additional sign-up fields on the Classic Universal Login, please check out this FAQ.
Alternatively, you could continue using the New Universal Login and use a Redirect Action to redirect your users to a custom-hosted page to gather more information, and then resume authentication.
Please let me know if you have any questions.
Thanks,
Rueben