Hi this is Alex. I am an indie game dev and as everyone should I try to create modular code to reuse as much as I can in every project. While migrating my UI to Unity Toolkit/ UI Builder it really bothered me to manually add bindings and localization to each individual visual element.
As I develop for fun 
I had to change this. And I ended up in creating an asset for the Unity Asset Store: Drop-In Settings Menu for UI Toolkit (UITK) | GUI Tools | Unity Asset Store
So what is different now?
Imaging not having to bind anything at all. You just maintain your Localization Asset - done!
An also for key bindings. Add you Action Map(s) - done!
For whom is this asset?
You are in need for a pretty standard UI, you can adopt to the style of your game. Go for It!
If you are in need for a very complex UI that has a low computational footprint and a low latency? Spare this asset a while until there is more production experience.
Please check it out. Iām curious what you think of this approach.
I wish you a fun time.
Alex / tiny launches