Yeah these textures are ue4 texturesThis is something called "swizzle". Every console has it and for every console is different.
I'm curious too what type of tool can save that textures from UE4 games to compatible for switch format.
mess around with the header? Is there a tool to swizzle this?https://www.psx-place.com/threads/correct-save-settings-for-tga-files.13082/
that's for the wii u, so you might fiddle with the settings.