Wi-Fi does not working in Dell Inspiron 5502 with Ubuntu 20.04

I bought a Dell Inspiron 5502 i5502-M40S. It comes with Windows 10 pre-installed, after some "exercise" I managed to install Ubuntu 20.04 in dual boot. To do this I changed from RAID to AHCI and disabled de secure boot.

However when I log in from Ubuntu the wifi is not enabled. Bluetooth is not working either. The curious thing is that on live usb everything works perfectly.

In Windows all is OK. Note that this notebook does not have an ethernet port.

From lspci I have Network controller: Intel Corporation Device [8086:42a4] Flags: fast devsel, IRQ 255

:~$ sudo modprobe iwlwifi && sudo dmesg | grep iwl
modprobe: ERROR: ../libkmod/libkmod-module.c:838 kmod_module_insert_module() could not find module by name='iwlwifi'
modprobe: ERROR: could not insert 'iwlwifi': Unknown symbol in module, or unknown parameter (see dmesg)

There are no return messages for rfkill list all or for dpkg -l | grep linux-modules-extra-$(uname -r)

Is there any way to overcome this problem?

Thanks

Your readings show that the package linux-modules-extra-$(uname -r) that provides the driver iwlwifi among many others, didn't get installed in your new installation. I suggest that you do, while connected to the internet by ethernet, tethering or whatever means possible:

sudo apt update
sudo apt install linux-modules-extra-$(uname -r)

Upon rebooting, your wireless should now be working.

I also recommended:

sudo apt install --reinstall linux-generic

...because its dependencies and their dependencies include linux-modules-extra.