@annokie , I see the same scenario as you do…
On 9/29, Major on AIS screen changed to “General Engineering” (was Engineering Review)
and under the Howdy/Manage Applications, Major changed to “ENGE” (was UNEN).
I looked under My Communications/My Letters as others have suggested – there is just the “Freshmen Admit” letter dated 9/22 which confirmed acceptance to TAMU but says under review for Engineering.
No letter yet officially stating accepted into Engineering.