Signal on Mint 19.3 not showing in Menu

Followed recent downloading instructions for Signal using Terminal and Apt including pasting the instructions from the FOSS article into the Terminal. A check of /etc/apt/sources.list.d showed it contained deb [arch=amd64] xenial main. Then I executed ```
sudo apt update && sudo apt install signal-desktop

Did it contain that in a file?

Were you able to install it and then couldn’t fin in the menu?