The other end of the LED does not work

Hello, ws2812b LED works fine when I connect it from one side, but it does not work when I try to connect it from the other end. How do I solve

I’m trying to reverse the 2nd led

What “side”? Strips have an “in” side and an “out” side. The controller goes to the “in” side.

You can connect the power lines from any “side” (or even the middle) as long as you get the polarity (V+ and ground) correct.

Data has a direction and must start at the “Data In” connection.