Thank you for that advice. I've tried searching tags, and I am aware that I can enter my own tags into the box, rather than use the ones that are suggested. Sadly though, as you seemed to be infer, there's a lot that hasn't been tagged. I'm really disappointed in itch.io here.
Take this for instance: https://logen-nein.itch.io/tenement-living-blues
This product doesn't appear if you search "CY_BORG tenement" or "CY_BORG generator". It's not tagged at all, and is simply in the Games > Roleplaying > Free category. The only way I found it was from a random blog post on another site. It's great content, and the type of thing I'm looking for, but Itch leaves me no way to find anything else like it, other than trawling sites and social media other than Itch. That feels ...bad.