E-E-A-T comes from Google's Search Quality Rater Guidelines and is treated as especially important for topics that affect people's lives, such as health, money and law. The key questions are who wrote it, whether they have first-hand experience or professional qualifications, and whether the information is accurate and well sourced.
For content from clinics, lawyers and tax accountants, stating the author and reviewer, the update date and the sources helps with both E-E-A-T and AI citations.
