Is there a sensible way to search using a picture?

Google Lens is the easy one. On desktop, right-click any image in Chrome and choose Search image with Google, or click the camera icon in the Google search bar and upload a file. On a phone it's the camera icon in the Google app. If you're trying to find where a photo came from or whether someone's using your images, try Bing visual search and TinEye as well. They each find different copies.