Paypal webhooks with NEXT's edge runtime

I'm currently testing paypal webhooks locally and it runs just fine on the normal runtime but when i turn on edge, i can't get the body of the request (in particular webhook_event which is necessary for this: https://developer.paypal.com/docs/api/webhooks/v1/#verify-webhook-signature_post )

any ideas why i can't get the body at all when using edge?
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