Fwiw, if it helps to know, I clicked "Explore" in the web browser (this works in both Firefox and Chrome, although ofc it would bc it's just a URL issue!:-P) and then clicked Movies & TV, and that link is what it points to right now.

Oh I see now... on a mobile device I did not scroll down, but the Explore menu has both Feeds, up top where people using a mobile web-browser would see those first, and then Topics down below. Anyway that Feed is what most people will most readily find when looking for that content, so it may be good to try to get those communities added, by contacting whoever owns it, or making a new one and replacing that menu choice with yours, or some such?

And mods can change that? Well if so then that's great!:-) My knowledge continually falls behind on how PieFed works (at some point it was a file in the sourcecode so only an admin could), but quite frankly that's great too because it reflects how extremely quickly that code continues to be updated! :-D

Piefed.ca shows All posts by default, to anyone including guests without an account, whereas Lemmy.ca's default was to show only Local - the latter was a huge blocker, so that having changed now on their piefed instance makes all the difference?

I could see promoting lemmy.zip with a warning, similar to how you sometimes used to do with lemm.ee iirc, citing how it did not make moderation choices for the user unlike Reddit. But for a mainstream normie I would avoid it, or again at least put in a word of caution to explain.