With the Shopee Channel app you can add products from Shopify to Shopee or Lazada by using the "Add to Shopee / Lazada" button.
After that the product is automatically synchronized to Shopee. Syncing is fully customizable on the preferences page:
We also have an extensive documentation site at: https://shopee-channel.helpscoutdocs.com/collection/1-shopee-channel
Feel free to email email@example.com if you have any questions.