To change the global settings for the app, please go to the settings page first, here you'll see your app status where it is showing on your storefront or not. If it is showing successfully then you will see the app status enabled.
It's disabled then you can easily add it from the Add Block option and then Embed App.
At the other settings, you can set the global position(Left, Center or Right) of the product options. You can also fix the position of the price symbol from here as well.
Under the Currency formatting section, you also have the option to limit the addon height. Also the option for moving to the cart after taking action to "add to cart".
Explore the FAQ to learn about common issues and solutions