This makes a recipe to come back to the Overworld with a shrine
How to use it:
Put it in your datapacks folder in your world
What is the recipe?
You need an end crystal to come back to the overworld, but you need a ghast tear. So, I made an Alternative and replace it with a Amber Gem instead of a Ghast Tear. More info in JEI
if you want to make this work without the modpack, you will need the Better End Mod
Modpack: https://www.curseforge.com/minecraft/modpacks/end-survival-beta