Google has updated its help page for setting up Conversion Lift based on users, allowing self-serve access for Search and Performance Max campaigns. Previously, a Google representative was required for these formats.
To qualify for Conversion Lift studies, advertisers must meet specific thresholds. Accounts need a minimum of 1,000 observed conversions, excluding those with supplementary data, and a campaign budget of at least $5,000 USD.
The eligible campaign types now include Display, Search, Video, Demand Gen, App, and Performance Max, although iOS-targeted App campaigns and Travel Ads are not supported.

For campaigns in alpha or beta, advertisers will still need to contact a Google representative. A new section titled “Supported conversion actions and reporting” has also been added to the help page.
Read the official announcement here: Set up Conversion Lift based on users.
This update was spotted by Hana Kobzová.