@agalemmo I'm not sure I'm following. It sounds like you are saying:

I want folks to reach the password complete page I want the client_id to be present (for styling) But I don't want the redirect_uri, because that sends the user elsewhere

Is that correct?

Would it be helpful to you to add another redirect_uri (you can have multiple configured for an application) that took someone to a 'password change complete' page that you (not FusionAuth) hosted?