hey there!
you need to also swap out the symbol!
the symbol should have 4 has din and 2 as dout
the led's footprints also need to go on the backside of the pcb, b.cu, not f.cu, you can flip them using f
there are also some wires that aren't connected
you can use the back side of the board to wire components too! and if you want to switch layers, while routing the wire, press v to create a via!

hey there!
the footprint for your leds aren't correct
please see https://blueprint.hackclub.com/hackpad/resources
for the correct symbol and footprint libraries!
the leds are the sk6812 mini e, the e is very important
(also it's fine as it is, you don't have to add an encoder or screen)

Please add a screen or encoder.