How to detect keylogger and what to do if one is found

Does anybody have an idea on what to if there is a keylogger on your MacBook Pro device? My company was hit by a phishing scam that installed keyloggers by sending infected attachments through emails resembling exact employee accounts. Stupidly, I downloaded the attachment and opened it. It was a fake Microsoft login site and that I immediately deleted and uninstalled. I ran Norton, CleanMyMacX, and MacScan, and then factory reset my MacBook. None of them detected anything, but I know that new software keyloggers can disguise themselves as kernel tasks, making them deceptive and hard to get rid of. Please, I am looking for real steps to take in order to identify that there is or isn’t some form of malware on my device, and then what to do in the case that there is. This is a $1K device and I would like to save it, but I need to know what to do. Hopefully somebody here has insight into this type of issue, I really need help and I don’t know where to start.