I use this command for a list off all installed packages;
echo $(opkg list_installed | awk '{ print $1 }')
But what I really want is a command that only shows the packages that are not in the default build. (in my case the rpi4b)
Because, for example, when I use imagebuilder and I go from 21.x to 22.x and from fw3 to fw4 and I use the command just provider, I will install iptables-legacy. And that is not what you wanna do.