is 240331-1435 the RTM build? the watermark in corner says I am on a insider preview build. Win 11 wiki, also shows a couple of later builds before the Oct 1 release date. Looks like need '26100.3' ISO? .1 is insider preview and .2 or .3 RTM.
.1 is the official version, and .2 is the OEM channel update version, which is also the official version. However, you can download it through UUP at that time. The complete image can be downloaded from the hardware manufacturer, such as Dell recovery image *The recovery image was only available at the time, and has now been updated to subsequent versions
And again, with every build all kind of stuff is posted, we already know all this for weeks if not months now.