Concerns: pushword/admin, pushword/admin-block-editor, pushword/core
The parent-page chooser shows titles and paths separately and ranks exact slugs first. It stays within the settings panel, and the last sidebar panel no longer stretches. Nothing to do.
The link tool searches the current site’s pages by title or path and keeps the complete address visible. Nothing to do with the default widget. Sites replacing editorjs_widget.html.twig: provide window.pageLinkList as described in the link configuration to include page titles; existing window.pagesUriList integrations still work.
On a gateway route such as /site-a/, page(otherPage) now uses otherPage's host prefix, for example /site-b/slug. Nothing to do.