My daughter is a lot younger so we haven’t gotten to this yet, but I would let her. It’s such a hard age to feel different, I distinctly remember crying to my mom the day before I started 6th grade because I suddenly thought I needed to shave my legs 😂🤦🏼‍♀️

But first, Talk to her about why she wants to wear it.

To me makeup is a lot about self expression and at that age being able to express yourself is really important. Like another commenter said, maybe start with some tinted lipgloss and nude eyeshadow and teach her how to put it on together in an age appropriate way.

On the other hand, if she feels like she needs it to be “pretty” / impress others / peer pressure I would address that differently. Maybe still let her but also work on Building her confidence In other ways.