Looks like Lemmy doesn’t have any interest in adding a Wiki feature: https://github.com/LemmyNet/lemmy/issues/2959

aerkiaga mentions a workaround if you don’t want to run a separate service:

as a workaround, I suggest that you make one or more locked text posts in your community with all the desired content and link them to each other, plus a link in the sidebar. This offers the same capabilities as a Reddit-style wiki (Markdown, editing, multiple pages), except for edit permissions (and maybe discoverability/UX?).

As for discoverability, you could have a pinned post which just contains links to all the wiki pages.

It depends on how many of those pages you think are worth preserving. It makes sense to have a dedicated wiki service if these pages are regularly being collaborated on and there are a lot of them. Mailing in changes/additions to you via private message would be hard to deal with then.

Only these pages seem worth preserving, and one of them is a collection of links to images of 4chan and other sites:

• https://r.nf/r/visualnovels/wiki/problems
• https://r.nf/r/visualnovels/wiki/buy
• https://r.nf/r/visualnovels/wiki/vnhooking
• https://r.nf/r/visualnovels/wiki/recommendations

The buying guide is particularly useful, the problems guide could stand to be expanded on greatly ( especially for non-Windows users), and the VN Hooking guide has a lot of text that relates mainly to older methods like ITHVNR, but most players should be using Textractor nowadays, so it can be trimmed down significantly.

A WINE guide might be a good addition. And a…less CAPS LOCK Learning Japanese guide. I’m interested in collaborating on these guides, and I could write about using Textractor and OCR programs like transformers_ocr through WINE (there’s not much to it, really).