On October 15, '20, Magento 2.4.1 was made available in order to improve the online store's security and speed.
Have you already downloaded and installed Magento 2.4.1?
If so, have you ever experienced the media gallery's image display problem?
If the answer is once more yes, this is the answer.
In the backend, under Stores > Configuration > Advanced > System > Media Gallery, confirm that "Media Gallery" is set to "Yes."
For initial synchronization in Magento 2.4.1, the media.gallery.synchronization and media. content. synchronization queue consumers must be initiated.
If not, Magento 2.4.1's media gallery doesn't display any images.
For more information, Visit: https://meetanshi.com/blog/solved-media-gallery-doesnt-show-any-images-in-magento-2-4-1/