I love his animations, I wonder what programs he is using. He can do animations and calculations at the same time and it's all visually appealing. Most of his videos are amazing and fun to watch.
He's generally using his own tool called 'manim'. All of his code/animations are open-source. The code for this specific video can be found here: https://github.com/3b1b/videos/blob/master/_2022/wordle.py
https://github.com/ManimCommunity/manim/
According to 3b1b on the original repo:
"Note, there are two versions of manim. This repository began as a personal project by the author of 3Blue1Brown for the purpose of animating those videos, with video-specific code available here. In 2020 a group of developers forked it into what is now the community edition, with a goal of being more stable, better tested, quicker to respond to community contributions, and all around friendlier to get started with."