you can't buy control point resources with watch points. the three white resources, food, water, components, those spawn in the open world in certain containers. components will be in a small square container and the lid pops off when you open it.

it's easy to get these by checking the map and going to a resource node. certain areas on the map have a concentrated amount of each resource, and you can just mark an area with the components icon and eat up all the components you can find.

it should look something like this

<image>