LiveOps Server-Side Receipt Verification validation

Hello,

I’d like to be sure that the server side receipt verification is working correctly using LiveOps &the In-App Purchase plugin.

It seems to be OK on my debug iOS configuration (under the sandbox environment) : I have no specific error, and the onSuccess callback is successfully called once the purchase is made.
However, I have no indication (no traces) telling me that the receipt was checked (nothing more than when my app was not enabled yet in LiveOps).

So, How can I be sure that my server side receipt verification is setup correctly ?
Thank you.

Currently the server side verification is off for the game

OK, thank you.