Welcome to the Auth0 Community!
Unfortunately you can’t redirect directly to the forgot password button, so in that terms I would encourage you to open up a new Product Feedback thread explaining your use case.
For the 2nd part, I recommend checking the Forms feature and using it as a dialogue with your users; you will conditionally open up a form with information for the user that they need to reset their password. Alternatively, you can use the prebuilt action. You can read more about that here → Force a Password Reset after a Specific Number of Days
Thanks
Dawid