sh <(curl https://raw.githubusercontent.com/josephgodwinkimani/cyberpanel-mods/main/php_ioncube_install.sh || wget -O - https://raw.githubusercontent.com/josephgodwinkimani/cyberpanel-mods/main/php_ioncube_install.sh)
A direct answer would be:
cd /usr/local/
sudo apt install wget -y
wget https://downloads.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz
tar -xvf ioncube_loaders_lin_x86-64.tar.gz -C /usr/local
cp ioncube/ioncube_loader_lin_8.0.so /usr/local/lsws/lsphp80/lib/php/20200930/
echo "extension=ioncube_loader_lin_8.0.so" >> /usr/local/lsws/lsphp80/etc/php/8.0/mods-available/01-ioncube.ini
systemctl restart lsws