The original idea 

The concept for this addon came from another  one. credit to VitooorGames with his addon link : https://www.curseforge.com/minecraft-bedrock/addons/cheats-and-secret-items-in-the-creative-menu

Easy Creative Items [ECI] 

Tired of typing commands just to place a barrier or light block? "ECI" adds all those hidden, hard-to-reach blocks directly into your creative inventory — organized into clean groups right where they belong.

 Construction Tab — 4 New Groups:

Group 1

-All command block types + structure block

Group 2

-Barrier, structure void, border, deny & allow blocks

Group 3

-All 16 light block levels

Group 4

- Dragon, Wither & NPC spawn eggs + nether portal, end portal & end gateway blocks

Nature Tab — 1 new group:

Group 1

-Fire, soul fire, water, lava & their flowing states, powder snow, bubble columns & all frosted ice stages

Images 

Construction tab :

Natural tab :

> No commands. Just the blocks, where they belong. Behavior pack only, fully vanilla-compatible.