This is the same problem I am having. I have done all the steps requested here on this post, but still have the shifting. I have read about this on other website forums. The Ender 3v2 's that were bought in the last few months of 2020 seem to be having this problem. I purchased mine in November 2020.

The only way I can print without layer shift is to prop open the mainboard case to allow for better airflow to cool the mainboard.

I am also having the layer shift issue with my ender 3v2. I have been trying to figure it out. I have read on another forum that the 4.2.2 board on these printers from late 2020 are overheating. People have used bigger fans, opened the mainboard case, etc. These things seem to work for a while but most say the problem comes back with time. The only real solution I have read about is installing the 4.2.7 board. This printer I have is 2 months old. I am sure that most printers that have this problem are around the same age.