Google has said all ad campaigns will use Standard Delivery, and accelerated delivery will be switched to standard delivery in May 2020
starting April 2020, Standard delivery will be the only ad delivery method for any new Display, Video, App and Hotel campaigns. Accelerated delivery will no longer be available. All existing Display, Video, App and Hotel campaigns using Accelerated delivery will be automatically switched to Standard delivery starting May 2020.
Last year it dropped accelerated delivery on search and shopping campaigns.
Google Ads Drops Accelerated Delivery