To modify typography settings navigate to Appearance -> Customize -> Typography. Here you can find settings for Base font, Secondary font, Headings font, Form Elements, Menu links, Post article font and more.
Additionally you can connect Adobe Fonts and add your custom fonts. Open your Adobe account and navigate to My Fonts -> Web Projects. Copy the Project ID, paste it in Arendelle -> Adobe Fonts and click Save. The new added fonts will appear in both Elementor and Customizer settings.