Question about "using my eyes"

Hello guys, I have a question like i stated in title bout using my eyes when aiming.I am almost dia complete in like 100 hours but i have to push it a bit for now. But there is something idk how to describe it, bothering me. While i am playing kovaaks, aim training or benchmarking, i tend to only focus on my crosshair, idk it feels easier for me to track targets, flick, switch etc. There is a problem bout that, in games like apex and cs it doesnt really help me only focusing on that. Ofc i am looking on radar, ammo, hp essential stuff, but if I try to look on targets, i "loose" my vision of my crosshair, sometimes i hit my shots sometimes i dont. So i want to ask you guys what should i do, where is the problem?

Sorry about my english, its not my native language, if there is a bit of misunderstanding ill be glad to answer