The latest Series of Gym Stars was released this past Monday in the UK ... all 20 episodes available for streaming (in past Series, they were released one a week after being broadcast).

This is only available in the UK (with a "TV license "; I am only able to watch by using a good VPN to show me in the UK, & answering "yes" to whether I have a license!).
CBBC Gym Stars - iPlayer

So far I have only watched Episode #1 which I knew was going to be he last that Phoebe was going to be a large part of ... although at the end of her last segment, they did indicate that her clubmates have a "secret surprise" planned in a "couple of weeks" (which is going to be a going away party for Phoebe & Amelie before they leave for the states).