Request a new feature, or support for a camera/lens that you would like to use in Capture One.
To create custom ICC profiles, you have to use Calibrite's Profiler 3.0 but the problem is it still doesn't support Apple Silicon and after this year, it will not support Apple Silicon Mac as macOS will ditch Intel based apps soon. At this point, it's Calibrite's problem and yet, they didn't care about it for more than 5 years.
Why not add a feature to create custom ICC profiles within C1P which already supported? Beside, ICC lack many things compared to DCP that Adobe uses such as dual illuminant, built-in tone curves and color metrics, cross lighting, Color management directly from DNG/RAW, and more while ICC profiles lack those features and limited.
It's time to bring a proper color management workflow to C1P.