I do not recall at this moment, how Brave has incorporated the DuckDuckGo !bangs list, but I imagine that Brave does coordinate Brave Search’s usage, with DuckDuckGo’s list.
Search Engine maintenance being part of the Search Engine Competition.
Searching for articles that may interest . . . :
What are bangs, and how can I use them in Brave Search?
What !bangs can I use in Brave Search?
https://support.brave.com/hc/en-us/articles/4410152384781-What-bangs-can-I-use-in-Brave-Search
What is the bang for automatically navigating to the image tab and video tab results in Brave Search?
DuckDuckGo article - How To Use “!Bang” Shortcuts on DuckDuckGo Search
https://duckduckgo.com/duckduckgo-help-pages/features/bangs/