I am not the only one to say this:

Please remember that WCAG itself is the bare minimum of #accessibility. Conforming to WCAG does not guarantee something is accessible. It does not even guarantee something is usable. All WCAG does is provide you with a starting point. Lots of WCAG failures suggest the page has not even made it to the starting line.

Which I say at the end of this post comparing free automated WCAG testing with manual testing:
adrianroselli.com/2023/01/comp…

#a11y

Comparing Manual and Free Automated WCAG Reviews

Automated accessibility testing tools cannot test 100% of WCAG. This position is not controversial. Other than overlay vendors, no automated tool maker makes that claim.

^{Adrian Roselli}