GSC does filter and threshold what shows, but that doesn't always work 100%. Also those filters are built to work against traditional keyword searches, not prompts. It's also supposed to threshold low volume queries which should have kept a lot of things prompts out of GSC, but for whatever reason that wasn't very effective.

I've worked in many GSC consoles over the years, and I've never seen anything like what I saw in this case. (I'm the original author)