1. Flatpaks missing dark GTK theme
flatpak install org.gtk.Gtk3theme.Adwaita-dark
Also see this article about it.
2. Virtual Manager (KVM) ethernet not working
Open this file and add the following at the end right under #firewall_backend = “nftables”.
firewall_backend = "iptables"
Restart the libvirtd service.
sudo systemctl restart libvirtd
Now it should work after restarting the VM.
3. NVIDIA drivers
If you have a NVIDIA card, I suggest you follow the steps covered in this tutorial created by Fady Osama.
Or you can follow the oficial documentation at HowtoNVIDIA.
4. Bluetooth not working
sudo dnf reinstall bluez bluez-cups bluez-libs bluez-obexd