So my setup is the same, all linked together. daisy chained. looks how it is in ICUE. but the bottom 2 450's dont light up. and im not sure why but if i change the sequence of how they are all connected, the light up ones change. like if i switch which ones are connected. ICUE thinks they are plugged in but doesnt look like they get power. They do light up separately if i plug them in the node. i currently just them all connected in the best order to get the most lightening out of all 6 strips.
https://imgur.com/gallery/uHgSXlI