Two things: how to reconcile fake data writing to real databases, and how to handle publish-subscribe latency? For the first, does the tool mock database write

Two things: how to reconcile fake data writing to real databases, and how to handle publish-subscribe latency? For the first, does the tool mock database writes too? For the second, once services cross domain (team) boundaries, how to test batched updates from some event-processing consumer? That stuff seems like it needs a lot of collaboration and getting into the weeds for each customer.