Nintendo have a shit ton of studios working for them of course they have other IPs, they are one of the console makers, Oddworld studio is small studio.
And they are not releasing the exact same game over the years the same way super mario bros 2 is different than 1 and so one.
Looking at the list you posted, the last decade of Oddworld games have been remasters and remakes. Being a small studio doesn't excuse that. Oddworld: Stranger's Wrath was released on the original Xbox, that's a long time ago.