How to show window after submit (angular)?

Question

Angular

Hello. A little about the project:
On the login page there is a site logo and an authorization form. They have an appearance animation. The registration component also has this. And so that the logo does not load again, I made the authorization and registration pages to be child and loaded. Here is an example

spoiler

Now to the "problem"
I want that when submitting a form, for example, registration, a message appears that the user will go to the mail, and so on. That is, the form disappears - the message appears.
And such a message should appear not only at registration, but also when recovering a password, and so on.
How to do it in an optimized and reasonable way?
Now just route to login