Scrollable region must have keyboard access
Moderatescrollable-region-focusable
What it checks
Ensure elements that have scrollable content are accessible by keyboard
How to fix it
Review and fix this accessibility issue following WCAG guidelines
WCAG
Success criteria 2.1.1, 2.1.3. See the WCAG 2.2 quick reference.
More detail: Deque University's page on this rule.