To log bugs for ArcGIS Pro, please Contact Tech Support. You can do this by submitting a web form, or speaking/ chatting directly with one of our Support staff.
If you would like to share an idea with us about functionality you would like to see in a future release of ArcGIS Pro, please search the ArcGIS Pro idea exchange to see if other community members are looking for the same thing. If so, add your support for the idea by giving it kudos, and optionally, add your specific use case as a comment. If you can't find an existing idea, submit a new one for the community to vote on.
Ideas for other products should go to their dedicated idea exchanges. See the ArcGIS Ideas home page for all exchanges.