TinyIMG automatically inserts ALT texts for product gallery, collection main images, and article main images. Due to limitations within the Shopify API, other areas of the store cannot be accessed for automatic ALT text insertion. Therefore, ALT texts for these areas need to be added manually via the theme customizer.
If your tool indicates missing ALT texts for product gallery images, yet you've added ALT texts in the Product section's gallery images, it suggests that the theme isn't properly incorporating them. In such cases, reaching out to the theme developers to address and rectify this issue is recommended.