Don't let your dreams be dreams; there is the Svalboard Datahand [0]. Though, you may need to sell a kidney to purchase it.

In fairness to the creator, it's a niche product that would have taken quite some time to develop.

I quite like BenVallack's video about the Svalboard [1] (and his videos in general about his journey through the world of split keyboards).

[0] https://svalboard.com/

[1] https://youtube.com/watch?v=-Lz_FNoYHNM