Just started yesterday with Unity IAP, and the Unity dashboard says I got a sale. However, the google play console does not record any transactions. My question is, eventually when it’s time to collect the revenue, is it Unity that pays the money or does Google pay the money?
Unity IAP is only a wrapper to access the Google Play Store and Apple App Store IAP apis. That said, unity IAP also hooks into Unity Analytics, so unity also records transactions. To collect the money, you would have to go to Google Play Store. If google is not reporting that you received money, there may an issue with payment details you entered when setting up the developer account. I have also read there may also delay issues. So between the actual transaction, and it is processed by google, they would be a delay in processing the payment. I would expect the unity analytics hook in their iap api, would see the transaction instantly since unity doesn’t have to actually process the transaction.
You receive your earnings from the respective stores.
I think what my unity dash was showing was my test purchase. 
darn.