Can't find App Runner SLA

What's the service level agreement for App Runner? How many 9s?

Looked around but couldn't find it.

https://aws.amazon.com/legal/service-level-agreements/?aws-sla-cards.sort-by=item.additionalFields.serviceNameLower&aws-sla-cards.sort-order=asc&awsf.tech-category-filter=*all&aws-sla-cards.q=app%2Brunner&aws-sla-cards.q_operator=AND