In the old editing experience, it was possible to insert columns inside an Excerpt macro, doing amazing excerpting content.

Using the new editor, this is no longer possible, as the Excerpt macro doesn't accept nested layouts - it would be great if we could insert it in the Excerpt macro again

Workaround :
The below two options will not completely replace the layout feature but can be used as a temporary workaround.
1. You can use a table inside the Excerpt macro in place of the Layouts if you want to section the content.
2. You can make use of the "Include Page" macro in the destination page where you want the content to be copied. However, this macro copies the entire page content to the destination page and might not be the best workaround if you want to copy only a portion of the page content.