How to use the @theme-ui/presets.tailwind.radii function in @theme-ui/presets

model: {
          one: `#000114`,
          two: `#000114`,
          three: `#04041b`,
          four: `#000`,
        },
      },
    },
  },
  fonts: {
    body: `"IBM Plex Sans", -apple-system, BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"`,
    heading: `"IBM Plex Sans", -apple-system, BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"`,
  },
  breakpoints: [`600px`, `900px`, `1200px`, `1800px`],
  radii: {
    ...tailwind.radii,
    xl: `1rem`,
  },
  styles: {
    ...tailwind.styles,
    Footer: {
      textAlign: `center`,
      display: `block`,
      color: `textMuted`,
      px: [2, 3],
      py: [4, 5],
    },
    Container: {
      maxWidth: `1200px`,
    },
    p: {
      fontSize: [1, 2],