It looks like you have to be 18 if you want to attend without a parent. If under 18, you will need a parent or guardian with you according to the information I found here: https://www.yasmarinacircuit.com/en/faq#formula1

Relevent section, applies to race and concerts: “Children of all ages are able to attend as long as they have an adult with them at all times. Ear plugs are highly recommended.”