It seems this patch does no longer apply on recent core versions (10.2.6). Without the patch views containing computed fields do not work - at least on my site.
There is a more recent patch in the Issue discussed on
https://www.drupal.org/project/drupal/issues/2981047#comment-15585904
📌
Allow adding computed bundle fields in Views
Fixed
(The issue is also linked from the README.md).
If you change the address of your patch to https://www.drupal.org/files/issues/2024-05-08/2981047-190.patch → it should work again.
I second Londova.
On my site the problem also still exists.
The customer gets the confirmation mail, but no copy is sent the configured email address.
Is there a relevant other issue to follow or to find a workaround?
+1