If the product images are not showing on the frontend of your Magento 2.4 store, it can be due to various reasons. Here are some ideas and steps to resolve the issue:

Clear the Cache:

1. Start by clearing the cache in your Magento installation. Go to the Magento admin panel and navigate to System -> Cache Management. Click on "Flush Magento Cache" and "Flush Cache Storage" buttons to clear the cache.

Reindex Data:

1. Reindexing data can help resolve issues related to product images not displaying correctly. In the Magento admin panel, go to System -> Index Management. Select all indexes and choose "Reindex" from the "Actions" dropdown menu. Click on the "Submit" button to start the reindexing process.

Check File Permissions:

1. Ensure that the file permissions for the product images are set correctly. The image files should have read permissions for the web server. You can use the following command to set the proper file permissions:

chmod -R 644 <path_to_product_images_directory>

Replace <path_to_product_images_directory> with the actual path to your product images directory.

Check Image Paths and URLs:

4. Make sure that the image paths and URLs are set correctly in the Magento admin panel. Go to Stores -> Configuration -> General -> Web. Verify the "Base URL" and "Base URL for Static View Files" settings. Ensure that they are configured properly and reflect the correct URL of your store.

Check for Image File Existence:

4. Verify that the product images actually exist in the specified directory. Check the file path and confirm that the image files are present in the correct location.

Re-upload the Images:

4. If the above steps don't resolve the issue, try re-uploading the product images. Ensure that the image file names are in lowercase and do not contain any special characters or spaces. Also, make sure the image file extensions are correct (e.g., .jpg, .png).

Check Theme and Template Files:

4. Review your theme and template files to ensure they are not overriding or modifying the product image rendering. Inspect the catalog product view template files (catalog_product_view.xml, view.phtml, etc.) to verify if there are any modifications or conflicts that may affect image display.

Debugging and Logging:

4. Enable logging and debugging in your Magento installation to get more information about the issue. Check the system and exception logs for any relevant error messages or warnings related to product images.

Remember to take a backup of your Magento installation before making any changes, especially when modifying files or performing database-related actions.