Explaining a gap after caregiving or layoff after 12 years as a dental hygienist

I took time out to care for a family member after working as a dental hygienist. There are 12 people counting on me, so I am trying to be careful. I have done some volunteering and a course during that time. Did anyone get past it?

I was hired after a 12-month gap. The manager said the skills test mattered more than the dates.