Styles are available in Scrivener 3 - presets were part of Scrivener 2, so it sounds as though you are still on the older version? Actually, your profile says you are on Windows. Is that the case? If so, this is the macOS forum, so I think you meant to post over in the Windows forums. Styles will be part of Scrivener 3 for Windows, too. If you bought Scrivener for Windows in the past few months, Scrivener 3 will be a free upgrade when it is out.
All the best,