Hi @BrandenRobinson,
Welcome to the Auth0 Community!
That’s correct. The endpoint you are referring to is /api/v2/branding/templates/universal-login, which is for updating the New Universal Login page. (Reference: Universal Login Page Templates API)
To use the Management API to customize the New Universal Login text prompts, such as the password reset page, you will need to call the /api/v2/prompts/{prompt}/custom-text/{language} endpoint.
I recommend referring to our Customize Login Text Prompts documentation and clicking on the “Use the Management API” section for more info.
Let me know if you have any questions.
Thanks,
Rueben