They're starting to market hybrid airplanes, like this short-range/ regional business jet developed by Toulouse-based Aura Aero.
The project is called ERA (Electric Regional Aircraft).
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The plane is powered by 8 electric engines and 2 turbogenerators on "sustainable aviation fuel" (SAF). It would automatically switch from electric to fuel mode and the other way round pretty much like a regular hybrid car, with nothing required from the pilot.
First flight is expected this year and certification in 2028. A whole bunch of airlines (including some from the US) would be interested in the project and want to buy it.
It would cut fuel consumption by a mere 80%, compared to planes of the same category.
Range: 1,500 km (~1,000 miles).
Capacity: 19 seats.
They aim at boosting regional air travel by developing things like this.
There would be military applications too. The French Air Force would be interested in drones based on their technology.