Google yesterday updated the Google Ad Manager API. The version v202008 includes support for Audio Ads and the ability to specify multiple Viewability Provider Companies on a LineItem.
Viewability Provider Companies are third-party companies used to measure creative viewability.
According to the release notes from the v202008 of the Google Ad Manager API, Google added 5 new features for video, including the pacing computation method for impressions on connected devices for a Nielsen measured
LineItem, and adBreakMarkups to set the ad break type on LiveStreamEvents for DAI (Dynamic Ad Insertion).