Keyboard tenting ramp for the iclever folding split keyboard.
This is one of the most comfortable travel keyboard setups (and cheapest) that I've come across.
https://www.amazon.com/gp/product/B01JA6HG88/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The author marked this model as their own original creation.