The Facebook API does not support the combination of certain fields, breakdowns and levels. This is reflected in the connect dialog through the field groups and/or breakdowns being greyed out. Some field groups are also dependant on a level, e.g Ad creative data is only available on Ad level. Some breakdowns are dependant on a field group, e.g. Conversion Device is dependant on Actions and conversions or Video metrics.
Field group: Actions and conversions
Regular metrics
All levels: Compatible with all breakdowns except "Carousel Card".
Non-aggregatable metrics
All levels: Not compatible with the "by Dynamic Creative Asset" breakdowns.
Field group: Video metrics
Regular metrics
All levels: Compatible with all breakdowns except "Carousel Card", "Region", "Country, Region", "DMA Region" or "Post Reaction Type".
Non-aggregatable metrics
All levels: Not compatible with "Region", "Country, Region", "DMA Region", "Post Reaction Type" or the "by Dynamic Creative Asset" breakdowns.
Field group: Ad creative data (Only ad-level)
Regular metrics
Ad level: Compatible with all breakdowns.
Non-aggregatable metrics
Ad level: Compatible with all breakdowns.
Field group: Ad relevance (Only ad-level)
Regular metrics
Ad level: Compatible with Carousel Card or with Conversion Device, Destination or Post Reaction Type if Actions and conversions is selected.
Non-aggregatable metrics
Ad level: Only compatible with Conversion Device, Destination or Post Reaction Type if Actions and conversions is also selected.
Field group: Awareness (Only non-aggregatable metrics)
Non-aggregatable metrics
All levels: Compatible with all breakdowns except the "by Dynamic asset" breakdowns, if Actions and conversions is also selected.
Field group: Shared items
Regular metrics
Ad level: Shared Items are only available on Ad level and currently not in combination with any breakdowns.