In case anyone stumbles into this thread and is looking for the same specs that I was but with a mechanical, check out Keychron. My requirements were:
* Bluetooth
* USB-C (for charging and wired mode)
* Mac layout
* Small form factor similar to laptop keyboard
* Not outrageously expensive
I’ve been very happy with the one I bought.
I have no affiliation with Keychron. https://www.keychron.com/