Control Karoo 2 via Sram AXS

Hi, how can I control my Karoo2 with my SRAM Axs buttons? Why is this only available for Karoo3? https://support.hammerhead.io/hc/en-us/articles/25672636525979-Karoo-OS-Controlling-Karoo-with-SRAM-AXS-Controllers Any 3rd party solution like for Di2? Thank you