According to the documentation, the reset-password widget/prompt should be available and customizable. However, in reality, when using universal_login.html with the New Universal Login experience, this widget is neither available nor customizable.
Is there any workaround or official way to enable and customize the reset-password functionality in this context? Or is this simply not supported despite what the docs suggest?
Firstly, I would like to make sure that you are not trying to customize the reset-password page Classic Password Reset Page, since that might also be the point of confusion.
Otherwise, the reset-password prompt can be used to customized within the Universal Login experience in a few different ways:
If you are just trying to edit the text elements you can do this directly using the Auth0 Dashboard or the Management API ( see Customize Universal Login Text Elements )