Can anyone suggest some Horror films for my 10 year old daughter to watch?

It isn’t really a horror movie but The Bad Seed (1956) with Patty McCormack is pretty dark. Just hope it doesn’t give your daughter any ideas.

Like proper horror or more kid-friendly, horror-lite? I'll recommend a mix:

The Fear Street film trilogy (2021)
Village of the Damned (1995)
IT (2017) and possibly the mini series (1990)
Summer of '84 (2018)
The Good Son (1993)
The Blair Witch Project (1999)
The Faculty (1998)
The Hole (2009)
The Addams Family (1991) and Addams Family Values (1993)

Movies I second:
Firestarter (1984)
Scream (1996)
The Sixth Sense (1999)
The Craft (1996)
The Lost Boys (1987)

Return to Oz is horrifying even though it's not the horror genre {shudders😖}

Room For Rent

It's from 2019, realistic horror.. There is a scene implying oral sex, but I don't remember nudity.. I don't want to spoil it, but I'm not a father, either, but there is a bit of cocaine sniffing by this old granny who finds a bag.

Did anyone say Dead Alive yet?

I mean, if she’s basically cinematically educated, feed her a little bit of Under the Skin, see how that tastes. Whoof! (Maybe Eraserhead?) 🤷🏻‍♂️

Horror with a laugh:

*Topper
*The Ghost and Mr. Chicken
*About and Costello The Time of Their Lives

Something Wicked This Way Comes (1983). Based on a Ray Bradbury story.
https://en.wikipedia.org/wiki/Something_Wicked_This_Way_Comes_(film)

Might be the scariest children's film that Disney ever did.