It takes you to the seller page and then you can click on the products link to get access to what the seller is selling.
There isn’t a way to get a list of asin’s for what the seller is selling if that is what you are after. That would require a special tool.
No one can access your inventory. That is private and protected by Amazon. To know how many you have to sell, I would have to go through a few steps using a shopping cart, and then do that for each asin.