The graphical user interface at system startup is not working

After updating to KDE 6.2.4, this interface appeared in the settings.

However, none of them are working.
What is the matter?
I used all these lessons and there is no point in that

Are you using systemd or grub as a boot loader ?

Grub

I’m also using grub and I’ve installed a grub theme separately. Didn’t use plymouth and haven’t an boot splash screen enabled.

Check the Arch Wiki, you’ll have to add plymouth as a dracut module.