The Privacy Sandbox Analysis Tool (PSAT) supports the analysis of browsing sessions by shedding light on cookie usage as well as insights on the use and behavior of Privacy Sandbox APIs in Chrome.
This tool is being developed as an Open Source project available on Github, and to learn about the tool and start auditing cookie usage on your site, please check the information on the PSAT repository Wiki page: https://github.com/GoogleChromeLabs/ps-analysis-tool/wiki