Problem is, that payload in body for GET requests is actually not supported by many clients like axios, etc.
Also, why should POST-Request work with normal functions but not with background functions?
It makes absolutely sense to send data to a background function to control the behavior of the function.
You’re talking about background functions, but you’re using builder functions. These are 2 different things. Builder functions don’t support POST requests as mentioned in the docs. Background functions do support POST requests.