How to populate nested components in page controller?

I’m using a page controller to get and format data, but I can’t dive deep into some of the components. In one of the components I have triple nesting of components: dynamic zone with Service component. Service component have list with Service Item components, Service Item component has list of Price Item components.
How to populate all of the components, and all of the nested components?

On screenshots you can see controller’s code, Services component’s structure and data I got with this config.

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