The source – support.google.com
Smart Google Ads merchants have started automatically upgrading to Performance Max.
Google will give time for preparation – it will warn each advertiser 2-3 weeks before automatic renewal. A message will appear in the advertising cabinet, which will indicate the specific date when the campaign will be transferred to the Performance Max format. You should add the maximum number of objects to the ad, and monitor the statistics on the Insights page during the campaign.
Ads with formats not yet available in Performance Max (such as cars) will update in early 2023.
The Google team recommends not waiting for the automatic transfer of campaigns. The manual update tool is available in posts, on the recommendations page, and on the campaigns page, so you can use it.