Hello @akhilesh4u66f7 

If the product thumbnail is missing in the front of your Magento 2 store and the corresponding file is not found in the cache folder, there are a few steps you can take to resolve this issue:

• Clear the image cache:
  • Start by clearing the image cache in Magento. Run the following commands from your Magento root directory:
    • php bin/magento cache:clean
    • php bin/magento cache:flush
  • This step ensures that any cached images are cleared and new thumbnails can be generated.

1. Regenerate image cache:
   1. Magento has a command-line tool called catalog:images:resize that can regenerate the image cache. Run the following command to regenerate the image cache for all products:
      1. php bin/magento catalog:images:resize
      2. This command regenerates the cached images for all products, including their thumbnails.
2. Verify file permissions:
   1. Ensure that the file and folder permissions for your Magento installation are set correctly. The webserver (e.g., Apache or Nginx) should have read and write permissions to the cache folder and its subdirectories. You can refer to the Magento documentation for more information on setting file permissions.
3. Reindex data:
   1. Reindexing the data can help refresh the product information and regenerate the image cache. Run the following command to reindex all data:
      1. php bin/magento indexer:reindex