This is becoming a major issue since they are not passing our app review even when i've used sample webhook events which are identical to the webhook events i would receive from IG. The webhooks are not firing for me when i receive a message on IG, and the app review engineers are not able to understand when i give them a sample implementation of the webhooks where i'm hitting my backend with the same sample webhook event.

when I configure the webhook url on the app dashboard the webhook url gets verified correctly using the challenge token sent by meta, but the webhook events dont flow.