How i can add Iptable support to Ubuntu 20.04.1 Ubuntu?

Banana Pi BPI-F2/BPI-F2S/BPI-F2P
1

Please give me some feedback about how i can add iptable support to the 2021-06-06-ubuntu-server-20.04.1-armhf-ext4-v5.4.35-bpi-f2p image.

It’s very important to us to have iptable working on out BPI-F2P boards.

Thanks