"application/x-www-form-urlencoded: the keys and values are encoded in key-value tuples separated by '&', with a '=' between the key and the value. Non-alphanumeric characters in both keys and values are percent encoded: this is the reason why this type is not suitable to use with binary data (use multipart/form-data instead)"
It can definitely receive it but I don't know if there's a way to grab the body as an Object, you may have to do then parse it yourself using splitting on etc.
From everything I am reading, the Python support for workers is VERY limited, such that, only libs that have no native underlying libraries (e.g. Python internal libs) are supported by transcrypt.
Unless I'm missing something, although I have looked... Personally, I'm not sure I would refer to this as "Python support" for workers.
for miniflare, you can set the upstream origin with , so that way your pass-through requests land there, rather than trying to infinitely request yourself