If you’re willing to go down this rabbit hole: I have a Planck keyboard. It’s super tiny, only weighs 300g and feels good enough that I use it daily for work (programming) even though I bought it for travel. Don’t get too discouraged by the missing keys. It does have a slight learning curve and in my case I also tweaked the software quite a lot to get exactly what I want, but if you’re up for it, it can be super rewarding. I got the pre-built Planck EZ but it’s discontinued but there are other Planck-style boards out there.