How to Meet WCAG (Quick Reference) - The official WCAG quick reference.
Allows a lot of filtering, by level, technologies and so on. Could be a bit overwhelming, if you are new to all the
WCAG thing.
Accessibility Not-Checklist - A sortable and filterable list, wich makes
even clearer that accessibility is not only a developer topic, but can only be achieved on an interdisciplinary basis.
It's still based on WCAG 2.1.
Vox Media's Accessibility Guidelines - Another list for different the different
disciplines to shown who is involved to make a website accessible, and it's not only the developer team's job. There
also is a nice list of tools below the checklist.
Accessibility Awareness on Mastodon - If you have a fediverse account, I
recommend to follow them. It's not about WCAG, but about valuable general tips.