Figma can read and activate advanced features from OpenType fonts, but currently it can’t access the same features of many macOS built-in fonts, which uses AAT (Apple Advanced Typography) instead of OpenType.

Attached screenshots are two common bundled fonts, Helvetica Neue and Hoefler Text. Using TextEdit, I can access and turn on/off their more advanced features (round punctuation, oldstyle figures, etc), and I can do the same with CSS declarations in browsers as well. However, there is no way I can access these in Figma.

Supporting the same advanced typographic features with AAT will make an impact because a lot of people still use default fonts in production for expediency or cost reasons.