We can add all the Salesforce metadata listed on the previous page to an unmanaged package by using the Salesforce DX. However, we are not able to package the Fielo configurations as they are in the org, because Salesforce sees them as transactional data, not metadata.
To be able to do that, we use the Fielo Libraries and store them inside static resources, which can be packaged.
Continue to Store Salesforce Metadata in Repository to learn how to develop your own package.