Can anyone confirm if code completion for SuiteScript 2.0 is available in VSCode or Webstorm IDE?

Yes

to my knowledge the netsuite suitecloud plugin for VSCode doesn't offer anything in the way of code completion however you can use https://github.com/headintheclouddev/typings-suitescript-2.0 (for pure javascript projects as well)

^ Thanks for clarifying that; suppose I'm not familiar enough with VSCode

thanks, so it is working in webstorm then. I dabbled with a 1.5 years back and it never worked right, i will try to reinstall it again now

Looks like this right now for me