Similar qustions to this have been asked, I know, but I can't find a resolution.
My Custom connection works perfectly under test, returns a body with all the data I want, but when I try to use that data in PowerApps I can't get to Body only Value - whichis always "true". Here are a couple of screenshots which show the flow results of clicking the button, the ClearCollect I use on the button and the Value returned:

