Enderworld is a modpack that replaces the overworld with a completely overhauled verson of the End.

mod list

Oh The Biomes You'll Go (by AOCAWOL)
More Ores In ONE (by KG20)
Shutup Experimental Settings! (by Corgi_Taco)
Curious Elytra (Forge) (by TheIllusiveC4)
FerriteCore (Forge) (by malte0811)
Differentiate (by eltrutlikes)
Inventory Tweaks Renewed (by David1544)
EnhancedVisuals (by CreativeMD)
Fx Control! (by McJty)
Patchouli (by Vazkii)
YUNG's API (Forge) (by YUNGNICKYOUNG)
Pandoras Creatures (by andrew0030)
Curios API (Forge) (by TheIllusiveC4)
Long Fall Boots (by Nano_Heart)
Shulkered (by Mohatax995)
Repurposed Structures (Forge) (by telepathicgrunt)
End: Reborn (by elecatron)
No Default Auto-Jump (by al132)
Smooth Boot (Forge) (by UltimateBoomer)
Ender Tendril (by SilentChaos512)
JEITweaker (by Jaredlll08)
Ender Crop (by DrManganese)
CodeChicken Lib 1.8.+ (by covers1624)
Caelus API (Forge) (by TheIllusiveC4)
Placebo (by Shadows_of_Fire)
Ring of Blink [FORGE] (by kwpugh)
Traveler's Titles (Forge) (by YUNGNICKYOUNG)
Eatable Ender Pearl (by talhakayaadam)
Kotlin Libraries (by Intektor)
BetterEnd (Forge) (by Beethoven92)
PackMenu (by Shadows_of_Fire)
Alex's Mobs (by alex_khaan)
Mouse Tweaks (by YaLTeR)
Iron Shulker Boxes (by ProgWML6)
The Outer End (by BlueDuckYT)
Lazy DataFixerUpper(LazyDFU) [FORGE] (by Corgi_Taco)
Lycanites Mobs (by Lycanite)
Upsizer Mod [FORGE] (by The_Wabbit0101)
Falling Leaves (Forge) (by Cheaterpaul)
Ring of the Enderchest [FORGE] (by kwpugh)
Shulker's Faithful Factories (Previously Cobbler) (by britishnickk)
Dynamic Surroundings (by OreCruncher)
Iron Chests (by ProgWML6)
Colds: Lurker (FORGE) (by Coldspell_Games)
The Endergetic Expansion (by TeamAbnormals)
Ore Stone Variants (by personthecat)
Corpse (by henkelmax)
Waystones (by BlayTheNinth)
Just Enough Items (JEI) (by mezz)
Global Data- & Resourcepacks (by JTK222)
CreativeCore (by CreativeMD)
Draconic Evolution (by brandon3055)
Citadel (by alex_khaan)
Abnormals Core (by TeamAbnormals)
Brandon's Core (by brandon3055)
Grapple Hooks (by Intektor)
More Respawn Anchors (Forge) (by eltrutlikes)
AppleSkin (by squeek502)
CraftTweaker (by Jaredlll08)
Kotlin for Forge (by thedarkcolour)
Nourished End (by MuffinsDev)
Hwyla (by TehNut)
End City for BetterEnd (Forge). Original Fabric version by IchPhilipp, ported by Shap_po

Chocapic13' Shaders are hilghy recommended

Enderworld

Alex's Mobs

AppleSkin

BetterEnd (Forge)

Blueprint

Brandon's Core

Caelus API

Citadel

CodeChicken Lib 1.8.+

Colds: Lurker (FORGE)

Corpse

CraftTweaker

CreativeCore

Curios API (Forge/NeoForge)

Differentiate

Draconic Evolution

Dynamic Surroundings

Eatable Ender Pearl

Elytra Slot

Ender Crop

Ender Tendril