Your table of contents uses tags “Forts” and “Manufacturers” (plural), but the individual tiddlers are tagged with “Fort” and “Manufacturer” (singular).
If you want those individual tiddlers to appear in the table of contents tree, then tag them with “Forts” and “Manufacturers”. You can leave the singular tags in place so that directly viewing the “Forts” or “Manufacturers” tiddlers will still show the correct <<list-links>> macro output.
-e
Note to @TW_Tones… to manually bypass the “read-only” view of the online wiki, you can use the browser debugger. Right-click on any tiddler’s “X” (close) button and choose “inspect”. Then, in the debugger, you will see that the other tiddler menu buttons are still present, but are just being hidden. Select one of those hidden buttons and the debuggeer will show you a CSS rule that says button:is (...) { display:none; }. Uncheck the display:none; attribute (or change it to display:inline), and the usual tiddler toolbar buttons will re-appear. You can then edit the tiddlers to see the wikiscript code they contain.