Interestingly, on the MS site regarding 26H2 enablement it does say:
'Prerequisites
Before updating to Windows 11, version 26H2 using this enablement package, you must be running Windows 11, version 24H2 or Windows 11, version 25H2. You must have the following prerequisite installed before applying this update:
September 22, 2026—KB5124010 (OS Builds 26100.9546) Preview or a later cumulative update'
I did download the enablement package, & it installed OK, I will be interested if I can install this without the preview?