Wireless Driver activation
I have installed Linux Mint 19.3 and no wireless connections were available. Looking around found hint to run Driver Manager, it found Realtek Driver rtl8821ce-dkms so I unchecked do not use button and selected apply changes. After this completed a reboot was requested, after reboot I still cannot see a wireless entry in the Network Settings window.
I installed Linux Mint on two other computers with no such problems but they are older and wireless operation was available right from the start.