Can an actor reference a variable owned by another actor?

Development Programming & Scripting Blueprint
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I would like to have Actor A track the Target variable of Actor B.
However, this Target variable may be changed or cleared.
It is possible to communicate with Actor B every time a change is made, but I think this is not necessary if Actor A references Actor B’s variables.
I think this would be very convenient if possible, is it possible?

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It’s called blueprint direct communication

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This will be really useful!

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