Yes, why yes I did.
I guess a homeschool mom's work is never done.
Last year when my son started college, I introduced him to my Grammarly account which I use to help me with editing. Since he is an intensely private person, I knew he didn't want me reading his papers, but I knew that he (we all) could use a second set of eyes on his work.
This year, I instructed daughter to use the college writing center, as she would gladly let someone else look at her work, but since they are not opened yet, this early into the semester, she sent her papers to me for an extra set of eyes. Instead of making a correction for her, I used a tool in Microsoft Word that let's me make comments on the side of the page. This way I could point out grammar issues without changing the meaning or intended meaning of anything she wrote.
I really enjoyed being called upon for a little help from my girl, though I realize these requests will become fewer and further apart over time.
I don't know if this is a symptom of helicoptering or not, but at least I didn't re-write or change anything, wanting her to be responsible for her own edits.