nested children components with common text property

I want to build a copy component with the following layers structure:

copyComponentWrapper: parent component
properties:
  - copy
children Instances:
  - desktopCopy (instance of copyComponent): has > 12 variants
  - mobileCopy (instance of copyComponent): has > 12 variants

I have solved this with a single component that holds the desktopCopy and mobileCopy as different text layers, but it generates more than 100 variations, which is of course, undesireable.

I’ve read previous posts and it looks like linking children properties to parent properties is still not available.

I also know that can expose nested properties, but this implies that I have to enter the same copy twice in two different placeholders and it’s very confusing for the designer, and it also multiplies by 2 all variable integrations that I’m using with Salesforce Marketing Cloud.

So… is there any other option that I haven’t explored yet? As the exploited solution is very… non scalable.