This is a service dog wearing a safety vest. It is a kind of working dog. They are the dogs that contribute the most to humans and are the most adorable and noble dogs. It is not a polysemous word, it only means a dog like the service dog. Both it and the
🦮 (guide dog) are a type of working dog. It should be noted that this emoji was added to emoji in 2019, and most platforms and operating systems may not yet support its display.