https://www.avianews.ch/post/vol-inaugural-de-l-avion-%C3%A0-moteur-%C3%A9lectrique-%C3%A0-hydrog%C3%A8ne-de-zeroavia

Today, ZeroAvia made aviation history with a huge step forward for the development of zero-emission flight. The 19-seat Dornier 228 testbed aircraft took to the skies above England’s Cotswolds with the leftside propeller powered by a hydrogen-electric powertrain, making this the largest aircraft flown with hydrogen-electric propulsion!

https://en.wikipedia.org/wiki/Dornier_228