Float could have been installed upside down as well.
Tang on the end of where you clipped on the needle and wire hangar should face down.
Let me ask you this. How is it that you are sure the carb is not filling? What did you do to verify or is this an assumption?
Also, since it is your first time cleaning a carb I would bet that the idle lift tube has not been properly cleaned out which will give you the same result. No fuel.
Should be able to remove a bowl drain and verify fuel flow through the needle and seat.
Or - if the carb is removed already and dry of fuel just turn the carb over and try and blow through the supply nipple. Should not be able to. Turn the carb back to the running position and try again, should be able to.