Kickstart fails with text

i used to install fedora and centos by pxe and kickstart via http.

when i just alter the source url in a kickstartfile to install rocky instead, i run in some option-problems.

first, rhel/centos/fedora uses text als option to not start a gui for the installation.
in centos i get the message text mode actively choosen (or so), with rokcy i get
“if the graphical installation interface fail to start, try again with the inst.text bootoption to start text installation”

but inst.text does not have an impact, nor does the usual option text.

what have i missed?