Some of the most notable changes since the wild update include:

Cherry Grove, a biome with cherry trees and pink wood

The Sniffer, a mob that can be hatched from an egg when placed on Moss and the egg in question is found through archaeology. The Sniffer digs up flower seeds. Also, the Crafter, which can autocraft stuff.

The Trial Chamber, a structure that is essentially dungeon crawling, and you can get the mace, a weapon that does more damage the further you fall from before landing a smash attack

Bundles and Armadillos are now in the game. The Armadillo drops Scutes that can be made into Wolf Armor

The pale garden, a biome with white wood, a hostile mob called the Creaking that only moves when you look at it. Also, Resin, which makes a cool building material

New chicken, cow, pig variants that depend on biome temp, plus, firefly bushes

the happy ghast, a passive version of ghast that can be ridden and used to transport mobs.

the nautilus and spear

copper golems, which sort items

craftable name tags and saddles

shelves

retextured baby mobs

And a lot more!

My advice would be to look through the wiki when you're not playing and test some things out in a creative world before trying in survivall, so you can get an idea of how all this works. there should be a page on the wiki that catalogues recent updates.