He also contested his first full season in the Porsche Supercup with Lechner Racing Middle East.

In 2021 he once again finished 3rd in the Porsche Carrera Cup Germany after scoring wins at the Red Bull Ring and the Hockenheimring.

In that year Köhler also made his first appearance in the Porsche Carrera Cup North America together with MRS-GT Racing.

Together with Timo Scheider, Luca Engstler and Jan-Erik Slooten he contested the Cup2-class in a Porsche 992 GT3 Cup.

[7] Köhler also joined Car Collection Motorsport in the Nürburgring Endurance Series and won in his second race.