Insider builds might not have the necessary drivers for your specific RAID controller. Make sure you have the latest drivers from your motherboard manufacturer or RAID controller card provider downloaded and ready to install during setup. You can usually load these drivers using the "Load Driver" option when prompted during the installation process.
Temporarily try disabling the RAID controller in your system's BIOS. This will present the individual disks to the installer, allowing it to potentially bypass the RAID configuration issue.
Since Insider builds are for testing and development, they might have bugs or compatibility issues with specific hardware configurations like RAID. Consider installing a stable released version of Windows 11 (like 23H2).