What Are the Challenges of Cross Functional Work?

Cross functional teams and cross functional work is certainly a popular topic these days. However, there also are challenges. How do you manage those challenges? Do you have any frameworks or protips from your own experience? It's not easy. When you do it, it's super valuable. Like just bringing a field obs person whois oup there is the teams,. Kind of let closer to the product teams, and allowing them to have the exchange.