Better Birch is a mod that (kind of) adds the features for the birch forest that were promised for 1.19.

It Adds:

A new biome, the birch pasture.
Three new flower types: Lavender, daffodils and Tropicobells.
A new tree type, the hardwood tree, with its own tools and blocks.
A new structure that spawns in the birch pasture, the fallen birch.

Have fun!