As a product manager, my decision to show a unit of our IG stories as a unit on FB feed instead of PYMK would depend on several factors. Firstly, I would consider the user experience. Would showing IG stories on the FB feed enhance the user experience? Would it add value to the user? If so, how can we ensure that we show the right IG stories to the right users? Secondly, I would consider the impact on engagement and retention. Will showing IG stories on the FB feed lead to increased engagement and retention? Will it help us achieve our business objectives? Thirdly, I would consider the technical feasibility of implementing such a feature. Is it technically possible to show IG stories on the FB feed? What would be the cost and effort involved in implementing this feature? Lastly, I would consider the competitive landscape. Are our competitors already showing similar features on their platforms? How does this feature fit into our overall product strategy and vision? Based on a thorough analysis of these factors, I would make an informed decision on whether to show a unit of our IG stories as a unit on FB feed instead of PYMK. I would also work with the cross-functional teams to ensure that this feature is implemented successfully and meets the expectations of our users.