Some time ago, the community voted on adding goats to Minecraft and they're included in this update along with enhanced mountain generation. Goats have good climbing ability and strong knockback. The next mob that was voted for is the Glow Squid, so we'll see that in the game eventually.
This update is set to release Summer 2021, which I think is a bit of a bummer, but understandable during these pandemic times. Also, Mojang has a website where people can give feedback and others can vote on that feedback. I know this is part of how the cave biomes became part of this update as I noticed it was one of the most popular suggestions. You can give feedback and see more at: https://feedback.minecraft.net/hc/en-us
If you want to read more about this update and more head on over to the article Mojang posted regarding this year's Minecraft Live: https://www.minecraft.net/en-us/article/minecraft-live-the-recap