Maybe it’s a Caesar cipher?
Alternatively, maybe it's typed with hands shifted one key to the right on keyboard: t (right hand) → if left hand on home row shifted: “ttbyq” with hands shifted right could decode to: t→g? ttbyq bydy af
Test shifting each letter backwards by 1: t → s t → s b → a y → x q → p = “ssaxp” — not likely. Maybe it’s a Caesar cipher