The idea on a clean install is so you have a clean reference point. You can always delete it later, use Migration Assistant to migrate data over, etc. CCC can no longer created bootable clones, FYI. Its a restriction in MacOS.

Glad it is working now.

 Here is a screen capture. A standard view of extensions is in front, these are normal. In yours, behind, you can see what I meant by not signed.
You can check this again by System Profile report, then click on the Extensions tab. You should see something like the left, not the right.

After I initialized a disk and created a volume in softraid and rebooted the system now shows that the softraid extension has been loaded. So for some weird reason problem appears solved.

This was an upgrade from Monterey. I wasn't clear on your suggestion for creating another startup volume. After I do that clean install on a new volume can I use something like CCC to clone my data disk to the new volume to avoid having to reinstall everything which is a massive pain.

Here is the new support file after I created a volume on an external drive.

If the SoftRAID driver is not loading, then all that happens is you get MacOS popping up dialog boxes wanting to initialize the disks (ignore). Your volume cannot be damaged.

You may want to either reinstall Ventura and see if this fixes this, or do a clean install. (which you can do on a separate volume in your system, so you have access to both. Disk Utility: click on your internal, + volume, and create. Then install Ventura into this volume, it will share the space and not affect your other volume.)

If you do a clean install, there is a trick to get System Security set, which is volume based, not computer based. Set Startup to the old system, restart, set startup to the new system. Shut down, now you can set System Security to enable third party developers.

Can you send another support file, with the SoftRAID disks connected? thanks

total 2328

-rwxr-xr-x@ 1 root  wheel  1191344 Oct 27 10:33 SoftRAID