edit: ignore, issue was my fault
in addition to that, i did not notice that manually setting support commanders only works for the default , not for the preset rascoms, rambo, etc. i tried seeing if there was a specific BP name for presets to change, but couldn't find them.
I noticed that the nxt file in gamedata only works if named Advanced strategic icons, otherwise log flags it as unsafe, but I assume that is built in behavior.