Clarification of "functionality"

I'd like clarification on the meaning of "functionality" as used in WCAG. The two questions are, when the user interacts with a form:

 1. does moving keyboard focus to a control count as functionality?
 2. does changing the state of a check box or radio button count as functionality?


As background, the Glossary includes:

    functionality

        processes <https://www.w3.org/TR/WCAG21/#dfn-processes> and outcomes achievable through user action

    process

        series of user actions where each action is required in order to complete an activity


     Thanks,
     Greg