Updating 'Usage' key in formatter label not updating the output when running with --help

[rafarrel]

VERSION: 2.6.1
OS: Windows 11

Adding this line isn't updating the usage line to display USAGE: app_name.exe [OPTIONS] when I run my application with --help:

app.get_formatter()->label("Usage", "USAGE:");

It continues to just output the app name like this: app_name [OPTIONS]. However, doing this works:

class UsageFormatter final : public CLI::Formatter
{
public:
    std::string make_usage(const CLI::App* app, const std::string name) const override
    {
       return "USAGE: " + name + (app->get_help_ptr() != nullptr ? " [OPTIONS]" : "") + "\n";
    }
};

CLI::App app{};
app.formatter(std::make_shared<UsageFormatter>());

Is this a bug/am I doing something wrong? Or was this functionality removed?

[phlptp]

The "Usage" label is only used when the usage string is empty, and name is empty, so that label use is limited.
what you likely want to use is app.usage("usage string") there is also a callback version of the usage that will execute when generating the help string.