what do childfree/childless people get instead of "parental leave?"

[csziggy]

184. Some people could use it to take care of elderly parents

Or take care of friends with no children or family. The second occurs to me since my sister has spent a lot of time over the last twenty years helping friends of hers that had medical problems or were aging and that had no family (or no family that could or would spend the time). She's supervised care at nursing homes and in hospice. She's worked at their jobs so they could have time for treatment once they used up all their sick and vacation time. She's made sure they got sufficient nursing care, food and clothing once they were home. She's helped arrange their funerals, sorted and disposed of their possessions when there were no family members willing to do it.

Some of this she's done since she retired but she also did it long before that, sometimes using her own vacation time to help her friends.

This isn't all she does with her life - she has her own active hobbies that have earned her national recognition in scientific fields and she volunteers with various groups, putting in lots of hours for their events. But if she were not helping other people, she'd have double the time available for doing the things she'd rather spend time on.