Hello, Kamil,
1. Thank you for reaching out to us. In order to solve your issue, there is only one possible way to display a product variant that is out of stock on the pages. Product variation that is ”Out of stock” can be displayed http://prntscr.com/t21xou with our variation swatches under Xstore > Theme Options > Woocommerce (Shop) > Shop Element > Variation Swatches > Swatch Out Of Stock (in case “Hide out of stock products from the catalog” option is enabled in WooCommerce > Settings > Products > Inventory). Please refer to the provided image: https://ibb.co/dc8b4Kk
2,3. In order to further assist you, could you please explain your issue more clearly, if possible with some screenshots for my better understanding? Alternatively, could you please provide me with a small video clip of your issue for my better understanding, as I am not able to understand what you exactly want?
You may upload the screenshots on https://imgbb.com/ and paste the links here.
You may use the https://www.loom.com/ screen recording tool that records your screen and upload it on their website. You may share the URL here.
4. Unfortunately, it is not possible with the current theme version and requires extra Customization. Item support does not include services to modify or extend the item beyond the original features, style, and functionality described on the item page. If you want paid Customization services, please submit a customization request toWPKraken team.
We hope this information is helpful.
Best Regards,
8Theme’s Team.