This plugin provides an option to add a default image in the backend option for the ACF field type image. It will provide the default image in the result when the image field value is not set.

Important Note: Default Image Addon for ACF is built on top of Advanced Custom Fields. This plugin requires ACF plugin to function. Make sure you have ACF installed and activated.

Here’s a link to the documentation for the plugin. This will help you learn more about its features and how to use it.
Documentation
For any feedback or queries regarding this plugin, please contact our Support team.