Can I customize how the Apiway app looks?

Yes. Account → Interface has six themes (Light, White, Cream, Graphite, Black, and Auto, which follows your device), a desktop wallpaper picker with built-in gradients or your own generated images, and checkboxes to hide or show left-menu items and desktop controls. One Reset to default button restores everything, and you can also just ask the chat to restyle the app for you.