Finally, I solved these 3 misfires that never go away after replacing new coils & spark plugs.

Over the weekend, I pulled out those misfire coils & spark plugs, applied some lube, re-seated them, cleared code & fire up the engine.

The misfire went down from 3 errors to 1 error (cylinder 1). Pulled out the coil 1 and re-seated it repeatedly but no luck. I went back to old coil but working.

I was about to get a replacement for coil 1 and an idea came into mind that I should give a final test by switching the coils between cylinder 1 & 2.

Surprisingly, the coil 1 is working in cylinder 2.

Thanks you all for giving me all the valuable advice & suggestions. If not, I would have ripped off by stealers for this simple solution.