2.2 has been released as draft for review. Interesting too that Personas listing different fictional people is provided as usability baseline. This is much like what the University of Cambridge did with their Personas.
One change is reduction of level for Focus Visible. Several of the WCAG elements have been used in the ADA Guidelines but WCAG generally does not apply verbatim for closed systems such as kiosks. Many of the areas that WCAG 2.1 addresses are also addressed in ADA and Section 508 so in a virtual sense there is some applicability.
Here are the changes: