It was a sitcom that aired on Nickelodeon from 2003-2006 starring rapper/actor Lil Romeo(son of Hip-Hop label "No Limit Records" founder Master P who produced the show under his production company P Miller Collection and starred on it as Romeo's uncle, I suspect his involvement in the show might be why it's never been released on streaming or home video as Nick might not want to pay royalties to him. Tom Lynch Co was also involved in production so there might be some debate as to who currently holds the rights to the show, Nick may no longer have them for all we know). All of season 1 has been found but a number of episodes of seasons 2 and 3 are currently missing(which is strange considering that unlike Noah and Skeeter, Romeo actually was in reruns for a number of years on multiple networks like BET, MTV2 and The N after it's original run on Nick ended, reruns went on until December 2008 so you'd think tapes of all the episodes would've turned up by now). I used to watch that show a lot as a kid and might've even potentially seen some of the missing episodes(can't remember for sure though).
Are artifacts worthy of having articles or is it a case by case basis?
I saw there was a lost painting with an article but other than that I couldn't think of another example. What did you have in mind?
While exploring the topic a good while ago, the Sword of Islam stuck out to me, alongside the classic Amber Room. I'm checking Wikipedia again and there's an entire article dedicated to art that was lost in the September 11th attacks.
"Os Companheiros", a german stop-motion series that was aired in Brazil in the 90s, but it's original german name and information (who made it, which studio produced it...) are lost to time or unknown.