I just did an install on my secondary NVMe of Fedora 34 using the March 26 nightly of Workstation Live.
I have done about 50 such installs in the last four years, but this was my first with wi-fi.
I was not able to change the time to AM/PM in that part of the installer.
However, somewhere and somehow, I must have screwed up and installed Rawhide Everything Boot on
the USB thumb-drive, instead of the Fedora 34 nightly.