NVIDIA drivers installed but not available in Additional Drivers

My system is a Samsung NP450R5E-X04IT Ativ Book 4 with GPU NVIDIA GF117M. It runs Ubuntu 21.10 with Gnome Shell 40.5 and kernel 5.13.0-20 on X11 session. Last fresh installation was with Ubuntu 20.04, then I updated the system every 6 months with the regular OS updates.

I use Nouveau drivers, no NVIDIA drivers were installed. Now, I want to install them. Firstly, I tried the following:

$ sudo ubuntu-drivers autoinstall
No drivers found for installation.

Then, I installed them by sudo apt install nvidia-drivers-470. The installation is ok (following the output with relevant data):

$ sudo apt install nvidia-driver-470
Reading package lists... Done
[...]
0 upgraded, 69 newly installed, 0 to remove and 0 not upgraded.
Need to get 305 MB of archives.
After this operation, 858 MB of additional disk space will be used.
[...]
update-initramfs: deferring update (trigger activated)
INFO:Enable nvidia
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/put_your_quirks_here
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/lenovo_thinkpad
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/dell_latitude
Loading new nvidia-470.74 DKMS files...
Building for 5.13.0-20-generic
Building for architecture x86_64
Building initial module for 5.13.0-20-generic
Secure Boot not enabled on this system.
Done.

nvidia.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-20-generic/updates/dkms/

nvidia-modeset.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-20-generic/updates/dkms/

nvidia-drm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-20-generic/updates/dkms/

nvidia-uvm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-20-generic/updates/dkms/

nvidia-peermem.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.13.0-20-generic/updates/dkms/

depmod..........

DKMS: install completed.
[...]
update-initramfs: Generating /boot/initrd.img-5.13.0-20-generic

However, drivers are not listed in Additional Drivers tab even after a reboot.

lspci command shows the follwing controllers:

 $ lspci -k | grep -EA3 'VGA|3D|Display'
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
    DeviceName:  Onboard IGD
    Subsystem: Samsung Electronics Co Ltd 3rd Gen Core processor Graphics Controller
    Kernel driver in use: i915
--
01:00.0 3D controller: NVIDIA Corporation GF117M [GeForce 610M/710M/810M/820M / GT 620M/625M/630M/720M] (rev a1)
    Subsystem: Samsung Electronics Co Ltd GeForce 710M
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

I've tried also to uinstall nvidia-driver-390 according to NVIDIA driver is not detected in Ubuntu 20.04 LTS but to no avail.

What prevents nvidia-drivers from appearing in Additional Drivers tab? Are there some missing commands to run to make the NVIDIA drivers selectable?