I know I already created a post about this, but it was moved from the Bug section to the Needs Help section. So I would like to submit an idea instead.
Please add “Floating Group” as an option in the Reusable Elements - Type of Element field. Right now there is only Group and Popup.
Please see this post for a further explanation if needed. Cannot create reusable floating group elements - #5 by Kfawcett