Some of the leads in your list will be ‘brand-gated’… which is Amazon-speak for ‘you need to request Amazon’s approval to sell this brand.’
But don’t worry: For each one of those brands, we are confident that Amazon will INSTANTLY grant you approval to sell in that brand.
You WILL NOT have to go through ANY application process at all. You’ll only need to click “Request Approval’, and will be instantly approved.
Here are the details:
Right now, when you go into Seller Central and attempt to add to your inventory an ASIN whose brand you’re not yet approved for, you’ll see the following screen: