From this forum post:
December Update:
After November 2024, we’ll be pausing monthly missions as we focus on developing and expanding Challenges. This shift allows us to dedicate time and resources to crafting new and exciting ways for you to engage with progression content in-game.
Monthly Missions have been an integral part of our community’s experience, and we’re proud of the connections and achievements they’ve fostered. Rest assured, they’re not gone for good! We’re exploring how to enhance and evolve the Missions program, with the aim of reintroducing it in a more impactful form in the future.
We appreciate your enthusiasm and participation in Missions over the years, and we’re excited to bring you more meaningful challenges as part of our growing content roadmap. Stay tuned for updates, and as always, keep riding and climbing toward your goals!