Even plans to make an Arduino switch device. Cool.
https://experiments.withgoogle.com/morse-switch
I never looked into the documentation before, there are some Morse learning tools too
Discussion
Iambic paddles would go right on there. Hmmmmm....
Straight key eh? Not the most popular CW key design these days but cool for a homemade approach.
They set a button for each, so it's kind of paddle-ish already. Could be a cool modern trainer.
Trainer I could see. The ergonomics of it made me shudder to look at a bit, but that sort of thing could be addressed without too much work with a 3d printer or even some woodworking I assume.
I have one of these. It's be pretty easy to wire those buttons to it.
https://cwmorse.us/products/red-double-paddle-with-steel-base