Do you mean site:wiki.onetwo.ren 间隔重复? I find Google could search individual tiddler of my wiki. Because I use nodejs wiki (TidGi desktop, an Electron wrapper for Nodejs wiki) to setup my site, so it has static webpage for each tiddler.
I tried to generate a sitemap with GitHub - tiddly-gittly/tw-server-sitemap: Sitemap plugin for nodejs tiddlywiki , so I have http://wiki.onetwo.ren/sitemap.xml and upload it to the Google search console or something.
Or do you simply want to search your wiki with Google, you could try GitHub - linonetwo/tiddlywiki-search-tw5-and-search-engine-at-once-user-script: Userscript: Combine TiddlyWiki5 (TidGi) and search engine (Google) results