The only somehow "civilian" aircraft on the apron of the air display SIAF 2023 is this Dornier 228, which is operated by Canadian air carrier Summit Air on behalf of parachute group Royal Air Force Falcons.
An attractive aircraft on this years event SIAF 2023 at Malacky-Kuchyňa airfield is this German Air Force A400, which carries special colours from the military exercise Air Defender 2023 (there is US flag from the other side).