Community developers are adapting pieces of Valve's ARM version of SteamOS to gaming handhelds that originally shipped with Android. The work gives several Snapdragon-powered devices a Steam Deck-like interface and access to Linux and Windows games, but it is not an official Valve release for those products.
VideoCardz reports that the projects use the SteamOS userspace Valve released for Steam Frame on top of an Arch Linux base. Developers supply their own kernels and hardware support because Valve's kernel is built specifically for Steam Frame.
Which handhelds are being supported
The current projects cover the AYN Odin 2, KONKR Pocket Fit G3 and AYANEO Pocket S2 family. A separate project called Holodor is being developed for the Snapdragon 8 Elite-powered AYN Odin 3, though VideoCardz says no downloadable build was available when its report was published.
The KONKR and AYANEO devices use the same Snapdragon G3 Gen 3 platform found in Steam Frame, which gives developers a closer hardware target. The ports still need device-specific work for controls, graphics, power management and other components that an official image would normally handle.
More flexible than Android, but still experimental