Hello,

Please try to use the below custom CSS code and paste it to Theme settings >> Custom CSS >> Global CSS code section:

.archive .product-grid-item .product-wrapper {
    border-top-left-radius: 10px !important;
    border-top-right-radius: 10px !important;
}
.product-grid-item :is(.product-image-link,.hover-img) img {
	 border-top-left-radius: 10px !important;
    border-top-right-radius: 10px !important;
}

Best Regards.