If you're curious how much of WCAG can be automatically tested (a FAQ I get), this page displays testing rules (ACT) by Success Criterion https://www.w3.org/WAI/standards-guidelines/act/rules/

As a companion, there is also @SteveFaulkner's excellent “Mind the automation gap” https://html5accessibility.com/stuff/2025/03/27/mind-the-wcag-automation-gap/