If you are installing on physical hardware, use the Rufus tool . It allows you to check boxes for "unattended" options (like bypassing TPM or creating local accounts) directly on the bootable USB, which avoids the need for a separate unattended.iso .
Outdated or faulty drivers may be causing the connectivity issue. To update the CD/DVD drive drivers: windows 11 cannot connect unattendediso to cd dvd 2 better
When creating the ISO with UnattendedISO: If you are installing on physical hardware, use
This will scan and replace any corrupted system files. windows 11 cannot connect unattendediso to cd dvd 2 better