is it easy enough to add promos and badges to all Views ? currently Badges only show in the PLP and PDP want to show in the Cart and Checkout and also Promos only seems to show for cart and checkout views but would also like to see them in the PDP and PLP

it's required to customize the PDP and PLP page in order to implement your requirements

You can do that using CMS if you are a no coder guy.