The Sand and Savanna Expansion add-on, is an update style add-on. I made it in the 7 days right after Minecraft Live 2022, since the amount of announced features were a bit sparse. 

Features:

• Quiver tree Forest (a new sub-biome for deserts)
• Quiver trees (for the biome obviously)
• A number of new blocks to build with
• Desert Shark (a new dangerous mob)
• Updated Savanna Generation
• Termite Hills (a growing block)
• Quiver (stores up to 4 stacks of arrows)

Quiver Forest:

They just look pretty 🙂 You can grow a tree by bonemealing the quiver leaves

Desert Shark

These guys will lay a trap and pull any unsuspecting mob beneath the sand to suffocate

Improved Savanna

Some tweaks have been made to the generation and colours of the biome, to create a more unique biome

Termite Hill

These blocks will grow over time to create large termite hills. They vary in size and is completely procedurally generated, so no two mounds will be the same

Quiver

Can be crafted from quiver stems. These items can be places in your off hand to equip them. After that you can hold some arrows and press crouch to load up to 4 stacks into the quiver. As you shoot from a bow or crossbow, the quiver will automatically give you a new arrow after every shot, until it is empty.

IMPORTANT!

Enable these experimental toggles: 

• Holiday Creator Features
• Custom Biomes
• Upcoming Creator Features
• Molang Features