I want all the products viewed and you enter qty and cart auto adds it and you click add to cart;
Example of this is undercovertourist.com
I don't think there is an extension for that, so you should build a custom solution to support that feature.
I could not quite get your question but according to my understanding, you can try the following Magento ajax add to cart extension. Hope it solves.
This extension allows you to add products to cart without reloading or refreshing the page so you can continue adding products from category page. You can also view the added products and edit product's specification. There are other useful features which you can explore for your benefit.
Magento Ajax cart by Magesolution will fix your needs! With this extension, your customers can add as many products to cart as possible or remove items from cart without having to hit “Update” button and wait for pages to reload.
For M1: https://www.magesolution.com/magento-ajax-cart.html
For M2: https://www.magesolution.com/ajax-cart-for-magento2.html
It is really a great feature. It will make the shopping process easier for online shoppers. It will be great if some company develops this type of features.