Isle of Kins & Volcanic Warrens Objectives

Beast Pen - Rare monster Mumbok the Enslaved; minor loot, skippable.
The Blind Beast - Optional boss drops Bile-Soaked Tome, granting +2 Weapon Set Passive points.
Doomed Mine - Minor objective; may spawn a shrine granting Lightning Damage + Movement Speed buffs.
Torn Map Piece - Found on Path of Exile 2 Currency a flayed sailor along the coast.
Magma Twins - Sulphirox and Magmatix, rare monsters; mostly flavor content.
Krutog, Lord of Kin - Story progression boss; introduces Matiki, unlocking the Eye of Hinekora.

Eye of Hinekora & Halls of the Dead Objectives

Trial of the Ancestors - Main optional quest for buffs.
Navali's Rest - Grants 5% Increased Maximum Mana.
Yama the White - Optional boss; completing the trial awards Hinekora's Tattoo, giving +2 Weapon Set Passive points.
Ancestral Tattoos - Permanent buffs, allowing players to pick one from:

1. Tukohama's Test: +5 DEX / +5% Lightning Resistance
2. Tasalio's Test: +5 INT / +5% Cold Resistance
3. Ngamavu's Test: +5 STR / +5% Fire Resistance

Early Visit to Ngakanu

Players can visit Ngakanu early after obtaining the Shark Fin (Tribal Medicine quest). Returning later in the story reveals a slightly altered village, ensuring players don't miss key interactions.

Shrike Island Objectives

Torn Map Piece - Fourth piece located next to a checkpoint in a Corpse Nest.
Scourge of the Skies - Story boss required for main quest progression.

Abandoned Prison & Solitary Confinement Objectives

Goddess of Justice - Permanent buff. Interaction with the statue grants 30% increased Life/Mana recovery from Flasks.
Forgotten Cells - Minor combat challenge; skippable.
Armoury - Flavor content with weapon racks; skippable.
The Prisoner - Story boss needed to cheap POE 2 Exalted Orbs progress the main quest.