Is it definitely a float you’re expecting? I’ve got a debug switch on my exec path which uses the Text Format node to display all of the potential data - something like:
‘Message sent to {add} - Str:{st} - Int:{In} - Float:{Fl} - Bool:{Bl}’
Copy this into a text format node then connect all of the OSC Pop types and address, and connect it to a print node.
Also - Shouldn’t you have something connected to the ‘bind to’ little red box on the received node?