Irqbalancing + Orange Pi R1 Plus LTS

Hey! im facing some issues with irqbalancing.
im using an orange pi r1 plus lts with OpenWrt 21.02.2 r16495-bf0c965af0 and i cant manage irqbalancing through all cores (0,1,2,3) But, i can assign a single core to an irq, but not two or more. i've triede these procedures with iperf3 and lan to lan (cat5e cable).
Any advice?
Thank you!

Hey, how did you boot into it? I am trying to get to it's console via UART. Can you tell how you connected your board?