If you receive INACCESSIBLE_BOOT_DEVICE Blue Screen after you have upgraded to Windows 11/10, then this posts suggests ways to overcome the issue.

If your PC is not booting and showing an "Inaccessible Boot Device" error, then here is a fix to resolve this issue and make your PC function normally. The inaccessible boot device is a common ...

Here's a workaround Microsoft suggests if your device is failing to boot after installing the October 10 Patch Tuesday update.

Fix The selected boot device failed, Press to Continue error in Windows 11/10. We suggest two solutions that are sure to fix the problem for you.

Windows definitely preferred the latter, since the former kept giving me more dreaded No Boot Device Found errors. Microsoft provides some further information on Legacy vs. UEFI boot options.