I don’t yet have it, but I’m looking at getting a Royal Kludge 70 RKS.

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USB Wired / Bluetooth / 2.4 Ghz Chicklet

Has a 3150 mAh battery, claims to be able to hold a charge for two weeks of wireless usage.

Also, is split.

So… you could more easily use it while say, reclining, or use it for better ergonomics in a sitting position, also each half has 4 adjustable little leg thingymabobs to further get an ergonomically optimal wrist angle.

OP, if you’re looking for a larger one, RK does make larger, mechanical keyboards, but not any that have say, a full numpad that also split apart.

Also again, grain of salt with all of this, I’ve not actually ever owned or used this KB, I am just also in a ‘looking for a Steam Deck / PC keyboard’ phase, and so far this one seems the best to me.