Free The Slaves Metro Exodus. Free the slaves in the outdoor mine and the slave camp in the caspian sea by stealthily knocking out the slaver guards. Enter the ship and reach the ending path to free the slaves.
Use the zipline at the dock to get on the slave ship. To enter the building you have to quietly get to the top, by the stairs. Again, it's not a huge deal.
You can make them leave if you dont stealth kill the oil bois
The same rule applies in metro exodus, where you define whether you will get a good or a bad ending with your own actions. The morality system in metro exodus is totally invisible. The reason for this is that ammo and resources are more. Go back to the aurora after you have done the side missions (or if you decided to skip them).