The basic groups for organizing subscriptions are free. If you want extended features, you should become a patron. It takes time to update the extension every time YouTube changes internally. The link to Patreon https://www.patreon.com/join/ysub is clearly available in the description. You should open it to see the list of features. We have no way to force you to read it if you installed it before opening Patreon link.

Furthermore, the decision to keep some features for the Patreon version of PocketTube was made to ensure the long-term feasibility of the free version.