For clarity, if you’re referring to lists like https://www.inaturalist.org/lists/kueda, those have never been lists of observations, only lists of taxa, so I’m not sure what the feature you’re requesting would do, exactly. Lists are also a giant pain the behind for us so, as Tony indicated, we aren’t going to do much to support them, certainly not integrating them into the apps. If you want lists of taxa you’ve observed within particular observation search parameters, I’d focus on making collection projects (you can set them up so you’re the only allowed observer).
If you’re referring to some other kind of “list” perhaps you can explain what you mean with URLs and screenshots?