Lime40 Keyboard, home made by Japan people.
Came out in 2019.
It is especially designed for smaller hands.
Total keys: 46. Each hand 23 keys.
It seems to me, the thumb keys are too low.
lime40 keyboard with wheel
Where to Buy
Am not sure, the site is all Japanese.
The creator is eucalyn.
Here's his sites:
If you have a question, put $5 at patreon and message me.