No Hitmark - Help please

I can shoot and kill people, but there is no hitmark, not white, not red and no skulls after they died, i can only see that i killed someone in the tab

Are you playing Lone Fighter or squads mode ??

lone fighter dont have kill feed afaik

I think you’re talking about lone fighter mode. Lone fighter mode is like the hardcore mode of Enlisted. There’s no hitmark, minimap, and kill feed.
And yes. you can only see that you kill someone if you press tab.