more than 1m for WS2812b 144 leds/m

I was searching for more than 1m of WS2812b 144 leds/m but I couldn’t except only 1m available.

Is there are reason why they won’t sell anything over 2m as I am looking for 5m long WS2812b 144 leds/m?

Maybe something to do with the power requirements?

You know getting all that current through a small PCB track and still having 5V at the far end.

144/m is a high density strip, and 1meter should already be powered (5volt+ground) at both ends.
5 meters of that could use ~40Amp.