You can do it manually (if you wish). Here’s how to do so-

To install the extension

1. Log in the FTP, and then go to Magento 2  root folder (generally present under the public_html folder).
2. Create a new folder named code under the app folder; under the code folder, create a folder named Ced.
   1. Upload or Drag and Drop app/code/Ced/Shopee directory.
   2. After successfully uploading the directory, the extension will be installed/upgraded.
   3. Now run the  following upgrade command in cmd 
      

      php bin/magento setup:upgrade

      

      php bin/magento setup:di:compile
      

      

      php bin/magento setup:static-content:deploy -f
      

      php bin/magento indexer:reindex
      

      php bin/magento cache:flush

   4. Once the extension is installed it appears in the main menu of the Magento panel just like this –
      
   5. Click on it and the additional options open up.