Illuminated Crown node not working

and yes i have the es helmet on

By any chance, are you using Eldritch Battery as well?

To elaborate on what was stated above, if you are using Eldritch Battery in tandem with the Everlasting Gaze unique amulet, this is expected behavior.

Essentially, using that combination results in all of your base energy shield to be converted into base mana, which then provides bonus energy shield due to the Everlasting Gaze's effect. In other words, that bonus energy shield is no longer from your helmet, it's a value derived from a percentage of your base mana. Regular "increased energy shield" modifiers will still affect your final total energy shield, but your helmet's energy shield has been converted to mana- and as per PoE2 conversion rules, the increased energy shield from your helmet does not apply if it is converted to something else.

In short: assuming you are using the aforementioned combination, the node is working exactly as it should- you will get 20% increased light radius, but your helmet no longer directly provides energy shield- your entire energy shield value is now sourced from a "gain as extra" modifier derived from your base mana pool, which happens to include what used to be energy shield provided from a helmet, but is now mana.

Presumably, if there was a node that provided "increased mana from your helmet", you would be able to scale the converted base energy shield-into-base mana for your final mana total. (but not any gained energy shield derived from this, as that still takes from the base mana value.)