Margin collapsing is the reason. When two paragraphs sit next to each other vertically, their adjacent margins collapse into one, so you get a single 16px gap, not 32px. Switch to padding and that collapsing goes away, every element contributes its full top and bottom space, which doubles the rhythm between paragraphs, headings, lists, etc. That's why the plugin defaults to margins across the board.

You can override it in your config though, the plugin merges your css object on top of the defaults:

typography: {
  DEFAULT: {
    css: {
      p: { marginTop: 0, marginBottom: 0, paddingTop: '0.5em', paddingBottom: '0.5em' },
    },
  },
}

Halve the values to compensate for the lost collapsing, otherwise the spacing between adjacent prose elements will look bloated. For background-clip specifically you might get further wrapping the target in its own element with padding rather than rewriting the whole prose ruleset.