Your app's look comes from your Owner website plus a few app-specific settings. Some parts match your website, and others are fixed for every app.
What you can customize
App name in the store: up to 30 characters.
App name under the icon: up to 13 characters, so it doesn't get cut off on some phones.
App icon and logo: pulled from your logo. The background must be either black or white.
Button colors, menu items, prices, descriptions, hours, delivery costs, and loyalty: these match your website. Change them on your website and the app updates too.
What you can't change
Fonts, text sizes, and text colors other than your buttons.
The app layout.
The app background, which is white. There's no dark theme.
ℹ️ Note: Changes you make on your website appear in the app within a few hours. To change your app name, logo, or colors after your app is approved, contact Owner support.