yes, but their interest is in emulating software distributed by steam
other games are only as much of interest as it might be games which could end up on steam or games which show some issue with the emulation which could be used to improve proton
there is also the thing that proton or wine just barely count as emulation, they are a bit of emulation but mostly just providing compatible OS interfaces adaption
(through Yuzu might but be that much different given how "mainstream" (but old) the switch hardware is)
other games are only as much of interest as it might be games which could end up on steam or games which show some issue with the emulation which could be used to improve proton
there is also the thing that proton or wine just barely count as emulation, they are a bit of emulation but mostly just providing compatible OS interfaces adaption (through Yuzu might but be that much different given how "mainstream" (but old) the switch hardware is)