I have a license installed for one individual XRT widget (XRT/graph for example). When I run xrt_license, I get output stating that there are no valid licenses found for other XRT products. Should I be worried about these warnings/errors?
There's nothing to worry about if xrt_license reports other products are unlicensed, so long as the product you have the license for is properly identified.
If xrt_auth reports other products as unauthorized though, that means your application actually uses other libraries, and you will need to obtain licenses for them as well (or a full XRT PDS Suite license).