I came across an issue for the first time where the cPanel icon was missing in the list accounts section. After digging around WHM, I found where the function was disabled.

• Log into WHM

• Select “Tweak Settings”

• Uncheck the box next to “Disable login with root or reseller password into the users’ cPanel interface. Also disable switch account dropdown in themes with switch account feature”

• Click save

After hitting save, you can go back to the list account section and the cPanel icon will be back.