I see that the similar title is marked as [Solved] but I tried what was stated as a fix and I still can not see any of my Items!

I installed: English (Canada), English (en-AU), English (en-GB), English (en-US)

Try setting all items to "All languages".
If the items, or the menu, or even the category belongs to another language Joomla! will not show these items.

Thanks for the suggestion.
How exactly do I set " all items to "All languages"." since I can not see any items?

In the backend, toggle the language selection to All and items from across three languages will show up.

Since you installed English (Canada), English (en-AU), English (en-GB), English (en-US) you tricked Joomla! into believing your site is a multilingual site with 4 languages installed.

If none of the items are showing up, no matter of the language selection, then try repairing your database's tables.

Problem resolved... but not sure how.
I just logged in the backend and into K2 Items and now I see all the articles. It may be that after I installed all the languages I did not clear all the Cache. I use specific extension and had it clear the cache for another reason, but did no think to go back to K2 Items to check.

Thank you for your help!

You 're welcome. I'm glad the issue has been resolved.