In Minecraft, there is a nether. What is it? It is a hell-like dimension which is dangerous. It is filled with lava, fire, unique ores, fungus-based vegetation, and a lot of hostile mobs. If you want to access the Nether, you have to construct a nether portal in the Overworld.
If you want to make the portal, you have to build a rectangular obsidian frame which ranges in size from a minimum of 4×5 to a minimum of 23×23. If the frame is built, then you are able to activate it by putting fire in the frame using fire charge, flint and steel, dispensers or any materials.
Bedrock involves the top and bottom 4 layers in a rough pattern and it essentially makes the Nether 127 blocks high unlike the Overworld’s 256. In the infinite world of the Java and Bedrock Editions, the Nether is also infinite horizontally. In the Bedrock Edition, the limit of build in the Nether is 128 blocks, even though it becomes 256 in all other dimensions.
Now, how to find biomes in the Nether? You are able to use Biome Finder. The finder itself can be in the form of web app, app, plugin or command. If you want to use command for finding biome in the Nether, you are able to use this command /locatebiome. This is a new command which was introduced in the Nether update. This command will make you easy in finding a biome in any of the 3 dimensions including Overworld, Nether and End. However, this command is only able to be used in the Java Edition.
If you use Bedrock Edition, you may be able to try to use Biome Finder on the Chunk Base website. The finders on the Chunk Base website can be used for Minecraft Java Edition and also Bedrock Edition.
How to use this finder? You are able to access the Biome Finder in the Chunk Base site and then when you are in the finder page, you have to enter the seed and also the version of the Minecraft that you play. So, it is important for you to know the seed. If you are playing Survival Singleplayer, the app will be able to fetch the seed from your savegame. Or, /seed command can be used ingame to get the seed. If you are playing in the Survival Multiplayer, you are able to use the similar command if you have sufficient rights. In the version box, you have to choose Bedrock 1.14 and above since you want to look for the biome in the Bedrock Edition.
It is important to know that this app uses several new web technologies. So, some features may be disabled for old browsers. Due to this, you will be better using the latest version of a major browser such as Firefox, Chrome, Edge or Safari.
Well, you are able to access Chunk Base now to find biomes in the Nether for Bedrock Edition. If it does not work, you are able to ask other Minecraft players about it in a Minecraft forum.