Keychron also has many keyboards with Bluetooth + USB-C cable -- the ones with "Pro" in the name, I think. I am personally a fan of the "Q" or "Q Pro" series (because of the knob), but there are other lines.

I think all of them have hot-swappable keys and many of them even have hot-swappable mechanical switches, I think. In most of their keyboards, all the keys (and key combinations) are fully configurable at the hardware level as well.

I can vouch for the quality of the ones I have (Q3), but mine don't have Bluetooth so I don't know how well that works.