This is interesting. Using the existing engine design, not electric. https://www.avweb.com/ownership/fuel-news/rolls-royce-runs-ae-2100-engine-on-hydrogen/?MailingID=1139
I am just surprised/impressed that you can convert a turbine jet engine to use hydrogen. I know it is no big deal to convert normal gas or diesel ICE engines to natural gas and even hydrogen. But turbines are totally different.