Historically difficult to create without third-party tools, it is now an official preset used primarily for technical testing, redstone experimentation, and custom map creation like SkyBlock.
"Świat Pustki Bedrocka" (The Void World of Bedrock) refers to a specialized world type and biome in characterized by the complete absence of naturally generated terrain, except for a small starting platform. Ељwiat Pustki Bedrocka
: Beyond this platform, the world consists of air blocks extending infinitely in all horizontal directions. Ељwiat Pustki Bedrocka
The "Void" also refers to the physical space below the world's bottom layer (Bedrock) or above the build limit. Minecraft - How To Create A Void World (Bedrock/Java) Ељwiat Pustki Bedrocka