Yep, Robocop Rogue City is using a Temporal Anti-Aliasing solution on anything with transparency or reflectivity... and without it, those aspects get checkerboard rendered instead (so half resolution which has 'gaps').
So I either have to accept that Unreal 5 games are just going to have ghosting and not play them, or allow it to checkerboard render in a crappy way by injecting instructions.
Guess Unreal 5 engine games are not being made for me.