I have quite a few hairs under my chin, probably more than average for my age but it's so hard to know since everyone removes it. My upper lip, too. The hair is almost transparent, so I used not to mind, but it's gotten thicker in my 30s.
Now I tweeze the chin hair and trim or wax the lip hair. I just started practicing threading on myself but haven't gotten good at it yet. I get fewer ingrown hairs and bumps from that than waxing.
I rarely do anything with my (invisible) eyebrows but they do look better when I get them shaped. I like full eyebrows but mine are sort of poorly defined, so cleaning up the edges makes them look fuller, in a way I like.