The Moebius strip was named after a German mathematician, August Ferdinand Moebius, who discovered it in 1858.
Another German, Johann Benedict Listing, separately discovered it in the same year.
Joseph Paper invented paper in 1857 so it only took a year.
They probably did, but there’s a difference between some guy gluing a piece of paper into a weird shape, saying “that’s cool” then throwing it away, and some science type doing it and writing a paper about it. In general stuff isn’t considered “discovered” until there’s published data about it.