The Unexpected Initiative quest in Arc Raiders is the jankiest one I've played so far, partly because it asks you to acquire items you can also get in other locations, but still gives you specific location-based objectives you have to complete. For example, if you've got a water pump and fertiliser in your stash already, you don't seem to be able to immediately complete the quest.
Instead, you'll have to follow Tian Wen's instructions, heading to the Grandioso Apartments and Piazza Roma in Buried City to grab them there as well, all in one run. Here's exactly where to find the fertiliser and water pump for Unexpected Initiative. There's probably not much point bringing a safe pocket considering you have to do all this in one run regardless of materials, so maybe go for a free loadout instead.
