Hello,

1- Regarding the Header Shopping Cart layout messing up, it was a third party Plugin conflict. The Elementor Pro was causing this conflict when we deactivated that the Layout under the Header Shopping Cart was appearing fine by then: https://snipboard.io/aJql9d.jpg

So, this was a third party Plugin conflict not an issue at the Theme level for this, you might need to contact the Plugin Support, they can guide you better.

2- Actually, there isn’t a specific separate file related to Sticky Header available due to the fact that a certain Sticky Header related class is being generated in the Header tag through functions.php file. So, here are the two Theme file locations which you can check regarding the Header & Sticky Header:

wp-content/themes/woodmart/inc/modules/header-builder (header builder is a folder here)

wp-content/themes/woodmart/inc/functions.php (in this Theme file, you can find the whb-sticky-shadow class being created when you search for this in the mentioned file)

Hope this helps !

3- As we have confirmed from the Test Site, for the Variable Products there isn’t any Quantity button being shown on it: https://snipboard.io/YI2nEv.jpg

For the Simple Products, it shows the Quantity buttons: https://snipboard.io/lIXSWj.jpg

4- Sorry to say but right now there isn’t such an option available to update the Quantity automatically after increasing the Product Quantity. You might need to use a third party Plugin in this regard that best suits you because we haven’t tested out any in this regard yet with the Theme.

Further, for the betterment of the Theme if you want to suggest changes at the Theme level then you can use the following Theme’s Feature Request thread and there you can put in your requests: https://xtemos.com/forums/topic/features-requests-2/

Hope this helps !

Best Regards.