I been factory reseting, doing all the tricks to get it work to go right back to camera fail. and it works for like 3 pictures then goes right back to camera fail what you all think it is
Camera fail is a common issue with Samsung phones. If you Google the error message you will see. I had the same problem with my note 20 ultra only after 4 months of ownership. I too tried everything to no avail. I took it to Samsung's vendor, ubreakifix, they ordered the parts and still did not resolve the problem. Ultimately, I had to send it in to Samsung for service and they fixed it within a week. I had a back up phone in the interim. Good luck
did you visit an authorized repair center to see if it's a camera hardware issue? if not, then please do so.
You can also submit error report to Samsung Members > Get Help tab after reproducing the issue once more.