GraphQL Admin API isPostPurchaseAppInUse field does not exist

I am using the 2021-10 version of the API to query if a post purchase extension is in use.

{
app {
isPostPurchaseAppInUse
}
}

I am getting

Field 'isPostPurchaseAppInUse' doesn't exist on type 'App'

Is there something wrong I am doing on my end? How can I find out if a store has my post purchase extension selected?

Thank you.

Nvm I know what I did wrong.