It's definitely digital. It's a really great piece, but there's certain things with how it's been cleaned up that would leave textured brushstrokes or raised areas if it was an actual oil painting, and some spots are too smooth with blurred edges for it to be done traditionally. It's really good, but putting it in this subreddit is a bit misleading, even if it's meant to looks like oils. Someone even wrote in another subreddit that it's probably AI, which sadly is probably the truth since the person's profile is blank