How do you search for something niche/old or know if it is complete and healthy ?

Some sites even from the megathread of this /c/ doesn't sometimes show health or if it is complete . Also even reccomended torrent search engine websites suck and only crawls through some websites is there any you would rec ? Most traditional ones doesn't work either like DDG, Google or brave any that work ?

Edit : Because of some comments I thought I should mention the tools I use for more better answers

Browser - Fennec with ublock in default mode .

OS - Android.

Client - Libretorrent .

And I would also settle for direct downloads but most sites I've found suck in downloading even with a download manager like they would cut of just for pausing or leaving tab/app, connecting to another app, small network issue, and have more dead links and good ones tend to be taken down fast . So do feel free to recommend ones you use .