Install grub2-splashimages by entering the following commands in the terminal:
sudo apt update sudo apt install grub2-splashimages
Description:
a collection of great GRUB2 splashimages
This package contains a collection of splashimages which can be used for GRUB2. If you'd like your splashimage in this package send them as bug report to Debian BTS.
Version: 1.0.1+nmu1
Section: universe/admin