Drupal8 WebForm how to enable display of remote server response?

Question

Drupal

Good afternoon

I've been fiddling around with displaying a remote server response for a few hours with no results when using a webform and Posts webform submissions to a URL.
From the form, the request goes to the server, the server issues a JSON/TEXT response. Problem - I can't display the contents of the response in the confirmation message.

How it should work:
the webform says: Name: Sasha
remote server replies {"msg":"Hello Sasha"}

I can't solve the task of showing "Hello Sasha" in the confirmation message.

It turns out to write the server response in the webform submission (using [webform:handler:remote_post:completed:msg], but there is no way to display it without writing it.
Please help...