Un-Craftable Addon
Un-Craftable is an add-on that introduces new crafting recipes for previously uncraftable items and blocks. With this add-on, you can craft items like the totem of undying, saddle, horse armor, saplings, grass blocks, podzol, and even spawn eggs. Additionally, it allows you to create normally unobtainable blocks such as bedrock, mob spawners, end portal frames, and chemistry equipment. You can even craft creative-only blocks like the command block and barrier.
Some Examples:
With this add-on, you can now craft items and blocks that were previously unavailable through crafting. Such as spawn eggs, creative-only blocks, and even the Enchanted Apple, whose recipe has been restored. Note that recipes involving a filled bucket or glass bottle will return the container to you after crafting.
Here are some examples of items and blocks you can craft:
Obsidian
Chainmail Armor
Chainmail armor can be crafted using chains, following the same patterns as other armor types.
Shroomlight
Shroomlights can be crafted using Crimson Fungus, Warped Fungus, or a combination of both.
Dead Bush
Any sapling can be smelted in a furnace to turn into a dead bush.

Ground Cover
Ground cover is now also craftable.
Grass

Tall Grass
Nether Sprouts

Aquatic Plants
There are also crafting recipes for seagrass and waterlilies. Here’s how to craft them:
Seagrass

Water Lily

Skulls/Head
Skulls and heads can now also be crafted, using Steve Head as the primary recipe.
Steve Head

Zombie Head

Spawn Eggs
If mobs drop two different types of loot, they are typically crafted using those specific loot items, with this pattern.

If a mob only drops a single type of loot, it is usually crafted with this pattern.

Sometimes, they can be crafted by combining another spawn egg with another spawn egg, and these recipes are shapeless.
Spawn Zombie + Spawn Pig = Spawn Zombie Pigman

Certain spawn eggs can combine with specific items to create other spawn eggs. Here's an example:
Coal + Spawn Spider = Spawn Cave Spider

Chemistry equipment or Chemistry Tables cannot be crafted and can only be obtained through the creative inventory or via command. Here's how you can obtain them:
Lab Table

Element Constructor

Compount Creator

Material Reducer

Note: You can view all recipes for items and blocks in the recipe book when in survival mode, except for the recipes of blocks that do not exist in the creative inventory. Here are the recipes for those blocks.
Creative Blocks
You can now craft blocks that were previously only obtainable through the use of commands.
Barrier

Structure Block

Structure Void

Allow

Deny

Border Block

End Portal

Jigsaw Block

Command Blocks
Where can you see all recipes?
The recipes provided above are just a few examples. You can find all blocks and items you can craft in your recipe book. Simply toggle off the filter button to view them all.

Afterward, you can click on a specific item to reveal its recipe, just as shown in the picture above.
Watch Showcase Here: