How to change font style?

[CoinCoderBuffalo]

I'm using this in an expo web project. How can I modify the font style?

const GalleryCard = props => {

    const { Layout, theme } = useThemeContext();
    const styles = useStyles();

    const settings = {
      width: '600px',
      height: ['250px', '170px'],
      layout: props.images.length == 1 ? [1] : [1,2],
      photos: props.images,
      showNumOfRemainingPhotos: true
    }

    return <ReactPhotoCollage {...settings} />
}