5 aircraft and 6 cabin layouts, from the DHC Dash 8-400 to the 737-800. Pick one for its seat map, the best seats and the seats to avoid.
There are seat maps for 5 Luxair aircraft here: the Boeing 737 MAX 8, the Boeing 737-700, the Boeing 737-800, the DHC Dash 8-400 and the Embraer 195-E2.
The Boeing 737 MAX 8, with 186 seats: 186 Economy in its main layout.