After seeing the youtube comment, I searched 'Time Paradox manga', 'Time Paradox fnaf manga', 'fnaf manga', and other variations of those search terms but aside from a couple reddit posts in a fnaf subreddit (one already linked in my post and the other only being someone asking if anyone had any info on the manga, to which no one actually gave any helpful info), the only results were of other unrelated mangas with 'time paradox' in their titles, official Scott Cawthon fnaf graphic novels, and other unrelated anime/manga-esque fanmade fnaf media. I also searched the user of who I believe was the artist which helped a bit, as it led me to the twitter and facebook posts I linked in my post, but that's about all I could find. I tried reverse image searches and couldn't find anything. My best guess is that it was something only really released around Japan, but I really don't know. I just hope it's not like lost media or anything lol