Do you have an example of how one might configure the VP3300 or any contactless reader for an L3 certification?

L3 certifications are like snowflakes in that no two are exactly alike. The backend processor (not ID TECH) should provide a guide on what AIDs, CAPKs, and Terminal Settings are needed. The link below is an example of all the settings one might need to identify to pass a particular certification.

VP3300 - Master Configuration Sheet - EXAMPLE.docx