We need to change default header menu link to custom page link.
Before Logged in:
=================
I want to add our custom register page url on menu instead of default URL.
After Login:
===========
Here, we need to change our custom Logout page URL on menu instead of default My account-> logout page url.
Ligin/Register pages are Woocommerce functional templates. Our theme does not have options to customize the functionalyty. You will have to search for a plugin or customize.