I've got a recumbent bike that I added electric to. I had to redo the setup though because I initially built it with a hub motor which made hill climbing still be a bit of a bitch so I rebuilt it with a middrive motor.
As a nice bonus, the wheelbase of my bike gives me a TONNE of space under the frame and within the frame for battery packs. So it's a whole project that I'm going to get started on after I move.
https://www.youtube.com/watch?v=b3eRv_FZjBc&list=PLPqn8bOJKP...
And get a Bafang motor:
https://www.utahtrikes.com/PROD-11620438.html
Also I've got a catrike villager