Yes. Maybe even with my TK*G in the reservation, but as this was a LH M&M award ticket my M&M No. (I'm only LH basic now) was in the reservation as default and when I changed to my TK*G card during OLCI, it was too late; seats had already been assigned. I inquired at check-in if seats in row 1-4 was available but all seats assigned/taken.

But to be honest I was fine with my seat on the upper deck for such a short flight and it didn't ruin anything. No need to overthink/overdo the seating issue for domestic flights.