There are very few wikis where this would not be a. Bad idea. We tested one recently with 66000 tiddlers.
However to do this. You use the actionnnavigate widget iinside a list inside a trigger e.g. button.
The list can have a filter for every tiddler except I expect system tiddlers. More often than not people use tags.
In my recently published code mirror edition I have an open all close all option on tag pills. So you can quickly open all tiddlers with a given tag.
I tend to give tiddlers a field like object-type with a value of note task etc.. And would only ever open or list all task tiddlers not tagged done as an example.
Regards
Tony
The three tag pill enhancements can be installed elsewhere.
Regards
Tony