Yes, LitExtension supports related products migration (including upsell and cross-sell products) . You can migrate related products:
- from/to Magento: related products, upsells, cross-sells
- from/to WooCommerce: upsells, cross-sells
- from/to Prestashop: related products, upsells, cross-sells
- from/to OpenCart: upsells, cross-sells