Hi @NMulder There are two different things to check:
1. Export actual metadata values from AEM Assets
2. Review which metadata fields are configured
Compare the CSV headers from the AEM Assets export with the metadata properties defined in your Metadata Schema. Also in Content Hub Configuration, verify that the same metadata properties are mapped for import fields, asset details, Asset cards, filters, search.
Test with a single approved asset: populate the metadata in AEM Assets, approve the asset for Content Hub, and verify that the same values appear correctly in Content Hub.
If your goal is to create an inventory of all configured metadata fields (rather than asset metadata values), there is no single out-of-the-box CSV export. The closest approach is to export asset metadata (CSV) > review the configured Metadata Schemas > review the Content Hub Configuration mappings and compare them against the schema.