Migrate/copy instanced foliage/actors between levels?

Hi,
I have a “time based” scenario, where I have different levels representing different time periods,with each level showing a slightly different amount of weathering over time/etc. I have a lot of instanced foliage/actors that are duplicated between levels - not foliage, but rocks/buildings/etc. Whenver I make a change to anything in one level, I have no idea how to propagate that change to other levels. Is there some way to export/import or migrate the position/rotation/transform of each or selected instanced actors between levels to keep them in synch?

I’m referring specifically to design time changes, not runtime.

Thanks

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Bump. Nobody got any idea?