As far as I know, RSS feeds are by definition a list of summaries, but maybe someone else might know differently?
To show the full article on Peek News, I would have to add this as a new feature. I would do it if lots of people want it, but it would take time because I have already been asked for a lot of new features, here or by email/private message.
Technically though, as per Google wear os guidelines, your app should not require lengthy activities: "Focus apps on critical tasks to help people get things done within seconds to avoid ergonomic discomfort or arm fatigue" and "Generally, when obtaining data from the internet, get only the necessary data. Otherwise, you may introduce unnecessary latency, memory use, and battery use."