Excerpt via Gutenberg Block not possible?

First of all thank you for your comfortable plugin! ??

I chose it because it has an overlay grid option and I saw, that the output of excerpts is possible.

Sadly I can’t find any option to display the excerpt in the overlay option.
Isn’t it possible or am I too blind to see? ??

And am I too blind to find a list of possible shortcodes for the Meta, too? ^_^

Regards
akg-free