Install budgie-indicator-applet by entering the following commands in the terminal:
sudo apt update sudo apt install budgie-indicator-applet
Description:
Application Indicator for the budgie-desktop
Package that installs an Application Indicator applet for the budgie-desktop. The applet is intended to be used instead of the X11 system tray. It displays application icons corresponding to applications that support the AppIndicator API
Homepage: https://github.com/UbuntuBudgie/budgie-indicator-applet
Version: 0.5-0ubuntu1
Section: universe/misc