Add variable to indicate whether third-party cookies are enabled

The erosion of third-party cookie support has had a substantial impact on how companies interact with their audience. Apple's rollout of Intelligent Tracking Prevention (ITP), for example, impacts analytics data collection as well as ad targeting. There are methods to check whether a website visitor has disabled third-party cookies, but these often require a level of site access that won't work for marketers who only have access to a tag manager. It would be great if Adobe provided an out-of-the-box solution that indicates whether a website visitor has enabled or disabled third-party cookies. This is different than the Cookie Support report, which indicates whether cookies are supported at all.