I recently stumbled across the Liberux NEXX smartphone, currently in crowdfunding. I think it gives off strong “MNT Reform” vibes: powered by the RK3588 family chip and features modular storage, RAM, modem, as well as physical kill switches for the camera, mic, wireless.
The stock OS is a flavour of Debian, but I have hopes that Genode Sculpt will support it (along with the Pinephone it already runs on). Like Reform (and Genode), Liberux is also an EU based firm, in this case hailing from Madrid, Spain.