Manage multiple posts at once using the ⌘ Command / Ctrl and ⬆ Shift keys in the feedback tab:

To select multiple posts one-by-one: Hold the Command (⌘ on Mac) / Control (Ctrl on Windows) key, then click the posts you want to edit (including the initial post).

To select a block of posts at once: Click the first post, then hold the ⬆ Shift key and click the last post. All posts in between are included in the selection.

You'll then see the bulk edit options!