It's a kisnt kn85. It's not tiny, but it's compact enough to comfortably sit on my knee. 13 inches, plus a tad

https://kisnt.net/products/kisnt-kn85-wireless-mechanical-keyboard

Keys are gentle, but responsive; just enough clack to be pleasant. As a gaming keyboard, I like it better than my Logitech wireless, or my wired Microsoft natural ergo. As a general typing keyboard, well it's my favorite non ergonomic because the key response really is perfect for my hands. I tend to prefer full size for serious writing, and need an ergonomic if I'm going to be at it for extended times (like editing a book), but for comfy typing around the house? Bang on.

I feel you with radials getting a tad overwhelming. I cope well, and I'm not diagnosed, but it's easy to get lost, especially since bg3 in particular likes to occasionally move things around. I've put in a few thousand hours on that game, and I still get a little frustrated running a wizard or cleric. Other casters, I tend to use a more limited range of spells, so I can just ignore anything past the first two radials.