I can see the purchase events for consumable in app purchase in the feed. But when I refund the purchase, I don't see any refund event in the feed. I traced on the Google API side and it looks like Adapty tried to access google.play.publishingapi.v3.InappproductsService.Get: and got 403. However, I believe this is not a permission issue as everything else works except for refund event. From this post https://stackoverflow.com/questions/62931171/google-play-developer-api-voided-purchases-api-response-403 The 403 actually comes from incorrect parameters of the API call.
So please check on your side to see if you call google.play.publishingapi.v3.InappproductsService.Get correctly and why there is no Refund event for Play store in the event feed.