You can install mods in "Minecraft" by playing the "Java Edition" and using the third-party app Minecraft Forge.
PC version only. Most mods are for the Windows release of Borderlands 4. Close the game before adding/removing mods. Back up your saves (paths below). Install and test one mod at a time and avoid ...
You can install Minecraft Forge for free from the Forge website, and then use it to download and enable mods.