Hi @visakh.12v
Welcome to the Auth0 Community!
Thank you for posting your question regarding the password reset flow with a magic link. If the magic link expires, there’s no option to have a Back to Application button on the expired email, as this is expected behavior.
When a new ticket is created, all older tickets of the same type (password reset in this case) are deleted for a specific user. There is no information about the tenant/connection for the old ticket. Tickets are also deleted when they expire. The button cannot be rendered since the tenant information is not available. (particularly the default login route).
Please note that another cause of the same issue is not setting the Default Login routes .
Thanks
Dawid