https://www.wpbeginner.com/plugins/how-to-add-taxonomy-images-in-wordpress/
Step by step guide that shows you how to add taxonomy images in WordPress. In other words, add image icons to categories, tags, or your custom taxonomy.
category iconsaddtaxonomyimageswordpress
https://www.mobileread.com/forums/showthread.php?s=f3cc6eb5f030efbd7772f94c1230474a&t=365470&page=3
Page 3- Tag browser: custom icons per category value? Library Management
custom iconsper categorytagbrowservalue