Are SF Symbols and other fonts provided available for commercial use? For example, in a marketing website.
SF Symbols & Fonts - Commercial use
My understanding is that San Francisco is only licensed for use to write apps for Apple devices (e.g. iPhone, Apple Watch, Macintosh, etc.) Outside of app development, you can create UI mock-ups.
Otherwise I believe SF font is not licensed for other purposes, and I think this also includes symbols. I would suggest consulting the Symbols and SF font license terms.