Ubuntu Bionic Making Menu Launcher - 2
Check if the alacarte Package is there
If Not then Install It with:
sudo apt install alacarte
If Got “User is Not in Sudoers file” then see: How to Enable sudo
Then Launch Main Menu Tool.
Select or Create Menu.
Click on New Item.
Next Click to the Left On the Launcher Icon
Then Browse for the App .png Icon file.
Again Fill in at least Name and Path to Binary
Possibly Browse the File System to Find the Executable…
And when done Click on Close.
Finally, find the New Launcher on Apps.
Here Below See How Locating Files/Icons on Linux Command Line
Ubuntu Best Software Installation Guides:
Best Software to Install on Ubuntu.