Welcome to the Auth0 Community!
The “Change email call” log entry you’re seeing in the Webtask logs is generated by Auth0’s internal processes during password reset. However, this information isn’t directly exposed as an event that can be consumed by a Post Change Password Action.
If you want, you can submit Product Feedback on our Community page to add more weight and visibility to the request, here is our link: Feedback - Auth0 Community. You can read our FAQ regarding submitting a feature request here: How do I submit Product feedback or feature requests?
Thanks
Dawid