But there are? A lot go a bit into the DIY territory but you can buy most of them pre assembled as well. With the QMK firmware you can customize everything you want about them.
e.g.:
https://splitkb.com/products/kyria-pcb-kit
151 karma · joined January 13, 2020
e.g.:
https://splitkb.com/products/kyria-pcb-kit
https://www.ncbi.nlm.nih.gov/pubmed/30611908
> In summary, long-term supplementation with vitamin D3 in doses ranging from 5000 to 50,000 IUs/day appears to be safe.