Is it possible to drive variables in multiple AnimBPs in sequencer with a single track? Alternatively, is it possible to have AnimBPs communicate with each other live in sequencer?

Development Programming & Scripting Blueprint
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I have three AnimBPs that are associated with three separate skelmeshes, and they each have a variable that controls their material assignments, and I’d like to be able to control that variable in all 3 AnimBPs from a single track within sequencer.

I’ve tried to set this up in as many ways as I can think of, but I haven’t had any success. I’m totally open to either a separate BP that drives all 3 AnimBPs, or if there’s a way to have two AnimBPs get the value of the variable in the other and use that to set it.

I’ve tried to cast it, but it won’t update live in sequencer, it seems to only read the default value.