Hi @revital.k!
Welcome back to the Auth0 Community!
Passing custom query parameters to the reset-password New Universal Login pages is currently unsupported. This is only supported on login flows. The custom query parameters are only supported for prompts that are reached through flows that begin from the /authorize endpoint as per the docs. Neither the email-verification flow or reset-password flows start at the /authorize endpoint, and therefore, won’t support the custom query parameters.
I did find an internal feature request for this functionality and saw it listed on a backlog item for improvements to the reset-password flow experience. Unfortunately, I cannot speak to a timeline.
if you would like to submit additional feedback requesting this improvement, you can follow the guidance outlined here: How to Submit Product Feedback or Feature Requests
Please let me know if I can help with anything else!
Best,
Mary Beth