Problem installing on mdadm raid

Hello, I’m having a problem installing CL on an mdadm raid setup. I’ve succesfully set up the drives the way I want them, but when I actually go to install CL the installer complains that there are both multiple CLR_ROOT partitions and also that it can’t find the CLR_ROOT partition. Is there any way to get this working, or does CL not support installing on raid? Googling found this How to RAID 0 on Setup on Notebook from 2020, which would seem to indicate that this is supposed to be supported, but I can’t actually get it to work. Thanks in advance.

Make sure you specifically do these steps from the referenced post (you have to actually launch gparted and have it commit changes):