Update:
While the error in play console itself is fixed after the solution Jambarrus provided above, when actually downloading and launching the uploaded game, it is stuck in a blackscreen. This is confined to sdk34+ as with sdk33, the game works as intended.
I’m not sure if this is related to the actual topic of the billing library, or another issue, but while investigating myself I wanted to already mention this here to see if anyone else is/has been encountering this already.
So my question to anyone reading this: Does your game work with sdk34 right now when uploaded through play console or is this a me issue? Have you encountered the same thing and solved it already?
Here are the warnings I am seeing currently when trying to upload, but whether solving them would solve this issue i’m not sure:
UPDATE:
Fixed it, for anyone else encountering this issue, here is what i ticked and it has nothing to do with the main topic of the thread, but ill leave it up incase it helps someone at some point:

