You're right that Framework is exactly where I would expect flexibility on this: I mean, just looking at their landing page - you see a laptop without the keyboard and ports. Framework offers 176 (!) kinds of "keyboards":

https://frame.work/marketplace/keyboards

but not one decent keyboard. Why?

(Answer: it's basically just keyboard covers, and the many options are due to variations of colors and languages. But I would take a hot pink / toxic green keyboard with ancient tibetan labels if the keys were non-chicklet, with decent travel, sizes, and feedback. 7 rows if possible.)