Something AMS touched upon was the idea of doing career relevant volunteer work during time away from the workforce. Having been a SAHM for 10 or so years, I did not feel it was very realistic. For the most part volunteer jobs just don’t work at a level that will be seen by an employer as anything equivalent to workplace experience. In my experience it’s a large stretch to think that being PTA treasurer, auditing the books for the a volunteer group, etc will be much like working in corporate finance.
There may be a few volunteer jobs that might work out that way but I would say very few and I imagine the are in high demand.