I Have a Question

I was reading some English entries. I like reading native English speakers' corrections because I can learn from them. Some people correct the same sentence in various ways. It's interesting to learn different ways to express a sentence.  Just now I read an entry. Two native English speakers corrected the entry.  I have a quetion about the sentence below: "I'm staying with my elderly mother who is assistance required." They changed "who is assistance required to "who needs/requires help," but neither of the native English speakers added a comma after "mother."  I thought it should be written in the non-restrictive mannar, so a comma would be necessary.  However, since the two native speakers didn't add a comma, I'm not confident about adding a comma either.