Hello @abanoubmourad,
Thank you for selecting XStore as your WooCommerce WordPress theme.
1. If you would like to add recommended products to the cart slide when a user clicks “Add to Cart”, please navigate to XStore > Theme Options > Header Builder > Cart > Show Linked Products (Off-Canvas) and turn it ON. Additionally, you can choose the Linked Products Type that best suits your needs.
For further reference, please refer to the image provided at the following link: https://postimg.cc/zLDQ6M0Y
2. Our theme XStore provides a Quantity Discounts feature. You can read and follow the steps written in our theme documentation here: https://xstore.helpscoutdocs.com/article/156-how-to-setup-booster-sales-quantity-discounts.
Alternatively, you can use a third-party plugin that may better meet your requirements, but please note that this is done at your own risk.
We hope this information is helpful.
Best Regards,
8Theme’s Team