How to setup & install on Software RAID partition?

I don’t see any option in Alma Linux 8.6 installer to break to a shell and set up a Linux Software RAID5 array. Do I have to use a LiveCD for this, or something similar?

Thanks in advance.

Matthew

To configure software RAID, select Create custom layout from the pulldown list on the Disk Partitioning Setup screen during the installation.

(post deleted by author)