You won't for some time as ARC is only supported on Linux kernel 6+. And honestly, their hardware is pretty bad for ML given you can pick up a used 3090 for $600. I just don't think there will be an ML push for ARC with current gen.
How do you know it's bad? Do you have benchmarks?
Just checked, used 3090s are going for $700-900 on eBay.
You can get the latest Linux pacakges for eg Ubuntu here: https://wiki.ubuntu.com/Kernel/MainlineBuilds - probably other distributions have similar easy ways since it's needed so often in bug reporting for users to tell if a hw support bug is in a distro specific kernel change or not.