Show ALL files starting with a dot in Finder

This answer from 2011 doesn't work for me:

defaults write com.apple.finder AppleShowAllFiles true
killall Finder

I still can't see .DS_Store for example, .localized, ._. etc

cmd shift . also doesn't work.

I can see other dotfiles after I use cmd shift ., just not ._.*, .DS_Store, .localized so far.

Finder supportsCommand+Shift+. to toggle hidden files. This is the same as using the defaults write command you list.

As of a recent version of macOS, this does not show .DS_Store, and there is no way to show .DS_Store files in Finder. There are likely other files that have the same exceptions applied to them. To view these files, use the terminal:

ls -a

Files that do not appear with ls -a either don't exist or cannot be viewed regardless of configuration.