I can't seem to find any at all. There seem to be some obvious Bible Commentaries and that I would have thought would have been included but haven't been. And I would love to be able to use Warren Wiersbe's series here. It would be lovely.
Welcome to the forums. I'm going to ask that this thread be moved to General, since this forum is meant for resource and feature suggestions.
As for your question, what have you bought? Logos software is free, but doesn't come with any resources, though there are some free ones that can be found on the website. And the mobile apps come with a few free resources.
Concordances aren't necessary. Use the Search function instead (provided you have at least one Bible).
Might I suggest contacting Rusty Davidson - he can help you if you need a base package (which is the least expensive way to get a variety of books into logos - not to mention the datasets that increase logos functionality), or if you are looking to buy specific commentaries. His telephone number is: 360-319-2554He is a good guy, and will give you the best price up front!