This package are available in:
https://winunix.github.io/debian/
Just install with command:
wget -qO - "https://winunix.github.io/debian/public.key" | sudo apt-key add -
echo "deb https://winunix.github.io/debian focal main" | sudo tee /etc/apt/sources.list.d/winunix-focal.list
sudo apt update
sudo apt install simulide