No. There’s no ability to enter text or scroll further, just a static list in a selector field. If not a bug, it seems like an unhelpful limitation.
But not the end of the world. I noticed that if I just link to a topic from a new topic, it’ll automatically recognize and put the link on the original topic.
And the link is hidden to non-staff accounts, so with some custom styling to highlight the link, I should be good.