I'm sorry to hear that you've had difficulty finding the "Recent Decisions" tile. From what I can see, this should be available in projects and other places and is mentioned in the documentation here:
I'm unaware of any settings or restrictions that would make it unavailable for you. If this continues to be an issue, please submit a support case in your private Jive Community customer group and a team member will help you review and troubleshoot you. If you're not familiar with the case submission process, please reach out to your community manager for clarification.
I hope this helps. Let me know if you needed anything else.