I have a bounty that is inside this cave but haven’t found the way to access it. I can see and hear the enemies that are above me but couldn’t find a way to climb up there or access it through a different angle:
So, this bounty is an oversight.
To fix it, you need to cancel the bounty and then enter from the south to unlock the door on the third screen from the inside.
There will be a ladder, but when the bounty is accepted, that ladder is removed.
Once you unlock this door, it will be unlocked forever