Oxygen's Image component does not provide the option to insert an Image-type custom field's Alt text using the dynamic data.
This members-only tutorial shows how we can create a custom PHP function that returns the Alt text and add it to the image's HTML output.
Ensure that your Image field's Return Format is set to Image Array in your ACF field group.
Install and activate Code Snippets plugin.
Go to Snippets > Add New.
Title: [Function] Get ACF Image Alt Text
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