Honoring materials vs Island question

Im doing all item level 250 islands, why do I only get tier 2 materials from them when its tier 1 materials i need. Im stuck on item level 420 since i almost get nothing from 2 chaos dungeons.
I have startet on the new region.
On the other region I did get alot tier 1 materials. There I did get a good amount of Harmony shards. On my new character here I dont get any and cant upgrade my gear.
I dont get the way this works beside it feels like a lot work for nothing I cant use at my current item level.

There are specific islands that drop T1 mats, here’s a list I used: NA/EU Island Rewards Guide - Google Docs

Ty ill take a look at it.