Greetings,

----- Original Message -----
> Hello Chakravarty,
>
> I use Fedora 33 live image to boot my SUT, but don’t see any file
> below in the live filesystem.
>
> /etc/sddm.conf.d/autologin.conf
> kickstarts
> /etc/sddm.conf

Those files are related to the KDE Plasma spin.  I assume you are using the Fedora Workstation (aka GNOME) spin?  If so, GNOME uses GDM for a graphical login manager than SDDM.  The "Welcome" program is part of the WORKSTATION spin.