This worldgen data pack infinitely generates a void world with properties akin to the original SkyBlock. This means all structures (that matter) will generate with their bounding boxes at the same location as if the world with the same seed was generated with normal terrain. End portals and sculk sensors generate in the world to enter the end and obtain sculk.
All structure bounding boxes will generate (i.e. no blocks will generate) at the same coordinates along with some entities as they would in a normal world with the same seed. Below is a list of notable structures:
In the end dimension, the obsidian pillars and the exit end portal generate as normal. When a player goes through an end gateway, a small end island will still generate, but the rest of the outer end islands will not.
My SkyBlock Collection has additional options for void worldgen. Most notably there are other presets that have the stronghold generate with the pit of lava beneath the end portal, or the entire portal room. There is also a preset that removes all blocks and entities, leaving only a biome map with structure bounding boxes. Additionally there are a few data packs to generate a default skyblock island upon creating the world.
This datapack is automatically compatible with any datapacks that only add structures to the world, such as Dungeons and Taverns, Structory, and Explorify. Any datapacks that modify worldgen using only density functions and noise are automatically compatible, such as Tectonic and Continents. Datapacks that modify worldgen in other ways or modify or add biomes are incompatible without an extra compatibility patch. The following compatibility patches are available:

A worldgen data pack that infinitely generates a void world with a biome map and structure bounding boxes that match a normal world with the same seed. Great for playing SkyBlock!