Portable Portal Add-on 1.21+

Sometimes you need access to another dimension right here and now, without any extra construction in Minecraft PE. The mod Portable Portal unlocks a new level of speed, letting you take the Nether Portal with you. The item is crafted according to a recipe and is activated by simple use, making it convenient for survival and exploration. You can use it at any moment, saving time searching for old portals or building new ones.

The item can be used both for traveling to the Nether and returning from it. The mechanic works reliably and doesn't require any extra settings.