Install Does Not Recognize RAID1

Soooo, you didn’t actually assemble the array…
Before you start the installation, open a terminal and run the commands to bring the array online, read my reply to your other post.

When you have it up and running, see if the standard or the advanced partitioning tool allows you to specify a mount point for /dev/md* without reformatting it.

It’s the same in Fedora.