How do I update the "Sign Up" URL?

I’m using Universal Login and I want to change the URL that the Sign Up link points to (I would attach a screenshot but this forum software won’t let me).

The most recent posts I’ve found about this, which say that this isn’t possible, are from 2-3 years ago (I would link to them, but this forum software won’t let me).

Has this situation changed in that time? My use case requires the Sign Up link to send users elsewhere, not Auth0’s built-in account creation endpoint. I’d appreciate some help or advice on how to tackle this problem.