Update f43 to f44 not completed and blackscreen on reboot

the Pascal GPU is no longer supported by the latest drivers. You have to remove the current drivers and install the nvidia-580xx drivers branch.

see Making sure you're not a bot!

these lines should do the job, run those line by line, package xorg-x11-drv-nvidia-580xx-cuda is optional

sudo dnf remove  \*nvidia\* -x libva-nvidia-driver,nvidia-gpu-firmware
sudo dnf install akmod-nvidia-580xx  xorg-x11-drv-nvidia-580xx-cuda
sudo akmods  

then restart the system

Output of the dnf distro-sync command seems fine.
You could take a look at the optional post-upgrade tasks

And the command rpm -qa |grep -c fc43 should only give a low 2 digit number.

Full instructions for the removal of the current nvidia driver and install of the 580xx driver are shown here.

Ok, i’ve followed the instructions to install the nvidia 580xx drivers. I believe everything is ok now. Thanks a lot everyone for helping ! Issue is solved