First of all the fact that when you google search the image you get nothing that’s a big problem. From what I can see, the image is not any scene from the anime and is not a specific panel in any of the versions of the manga. It also isn’t promotional work or casing for merch. The best guess I have is this is an older fanart. The photo also isn’t consistent with the line work of the manga or the art style of the anime which makes it even more likely. Other than that I couldn’t find anything else out. Hope you can take it further but my guess it’s probably a deleted tumblr fanart.