If you're looking to sync your Etsy inventory with Shopify, there are a few things you'll need to do. First, you'll need to export your Etsy listing data. You can do this by going to Your Shop > Shop Settings > Options, and then selecting the "Download Data" tab. Next, you'll need to import this data into Shopify. To do this, go to Your Shop > Admin, and then select "Import." From there, you'll be able to choose the Etsy data file you exported and import it into Shopify.
Once your Etsy data is imported into Shopify, you can then start managing your inventory from Shopify. You'll be able to add/remove products, change prices, and update your inventory levels all from within Shopify. And, because Shopify is connected to your Etsy shop, any changes you make in Shopify will automatically be reflected in Etsy (and vice versa).