There are no published API’s to get the extension name from the extension client ID
I’m not sure what you are trying to achieve?
I want the text of the extension to be modified by the broadcaster (text floating colour white “buttons”)
That text is the “name” of the extension and it can only be set via the Extensions console.
And it requires a “release cycle”/new version to change the name.
The “name” on that bubble cannot be changed by the broadcasters, only the developer when releasing a new version