When right-clicking a text box, and the Text Tool is active, there are two GN4 related menus:

InCopy menu

Add to Assignment

This submenu allows you to manage InCopy assignments for the listed items.

Export Selection

This command allows you to export the listed items to InCopy.

GN4 menu

Disable Import

See Disable import of text boxes

Body, etc

See Assign types to InDesign boxes.