Is there online dating for 10 year olds?

No. There are no such websites for minors, because:

• The law requires you to be 13 or over to have accounts online.
• The law requires you to be 18 or over (sometimes 21 or over in some countries) to access adult material.
• A minor does not understand the concept of love and dating as an adult does, no matter how much they think they do.
• Such a site would be banned almost instantly because it is a liability and a hassle to law enforcement due to the high risk of sex offenders who will prey on such sites.