I've heard of Minecraft PE many times. But what does that actually mean?
PE stands for Pocket Edition, the mobile version of Minecraft
This is the Minecraft Pocket Edition for mobile
This is Minecraft Pocket Edition. However, this version no longer exists.
The only Minecraft versions are now Minecraft Bedrock (Windows 10, PS4, PS5, Xbox Series X, Xbox One, Android, iOS and Switch) or just "Minecraft" and Minecraft Java (PC). As you can see, Pocket Edition became to Minecraft Bedrock.
Then there's the spinoff Minecraft Dungeons.
Minecraft Legacy (console edition of PS3, PS4, Wii U, Switch, Xbox 360 and Xbox One), Minecraft Earth, Minecraft 3DS, Minecraft Pocket Edition, Minecraft Pi Edition and Minecraft Storymode no longer exist and have been discontinued.