Hello, MAHDAR,
Thank you for the reply.
1/ Please contact the support of WPML plugin, to get assistance with it question.
2/ You can disable “Hide out of stock items from the catalog” in WooCommerce > Settings > Products > Inventory.
If you do not want to disable this option, please check if the problem persist when not XStore theme is activated, but a default WooCommerce theme – Storefront. If the problem is independent of the theme, contact support of WooCommerce and WPML.
3/ Please check if the problem persist with another theme activated (Storefront) to find out if the problem is related to our XStore theme functionality.
4/ Please go to Theme Options > WooCommerce > Single Product Layout > Show Product Stock Status > On.
Kind Regards,
8theme team