Ujm, Satmer certainly taught and teaches meforshim, including Rashi. Since they don’t teach Chumash in the actual Chumash, they teach it in Yiddish under a subject called “parshah” they therefore don’t teach Rashi on each posek, but in general meforshim, including Rashi, are taught together with the parshah.
BTW, I wasn’t “bought up Satmer”. I’m not from a Satmer family at all. I’m Chassidish, but I’m not Satmer.