Hello,
Try the below code
.main-products-loop .product, .products-loop .product, .carousel-area .product-slide .product {
display: flex;
justify-content: center;
}
.products-loop .ajax-content, .products-loop {
display: flex;
flex-wrap: wrap;
flex: 1;
}
.content-product {
flex-direction: column;
justify-content: space-between;
display: flex;
flex: 1;
}
.content-product .quantity-wrapper {
margin-right: auto;
margin-left: auto;
}
Regards