Yes, Magento 2 Extensions support multichannel marketplace selling. These extensions connect your store with channels like Amazon, eBay, and Etsy. You can manage products, stock, and orders from one place. This reduces manual work and prevents overselling. Magento 2 Extensions also sync data in real time across all platforms. Many of them include features such as bulk product upload, price updates, and reports. With these, it becomes simple to grow your business across multiple marketplaces.