How can array values from a blueprint be changed from sequencer?

I’m looking for a way to change transform values which are stored in an array through the sequencer to animate the object which is stored in the array.

To be precise:

I’m using a plugin for displaying VDB clouds (stuck on 5.1 with this project). The clouds can be placed through a plugin which has an array (S Vdb Cloud) with the clouds “Instance Editable”. The S Vdb Cloud has a Transform value which I use to define the transform of the cloud in the scene.
Now the problem is that I’d like to animate this transform in the Sequencer. How could I change the blueprint so that the Transform of the S Vdb Cloud is exposed to the sequencer? “Expose to Cinematics” is not available.

Link to the VDB Plugin: GitHub - eidosmontreal/unreal-vdb: This repo is a non-official Unreal plugin that can read OpenVDB and NanoVDB files in Unreal.