Set keys in level sequence with blueprint?


Is it possible to set keyframes on the level sequence from blueprint?

I have to make a phasing video of the construction of a building.
The walls must appear one by one (the visibility of each wall is activated step by step).
The location of each visibility key is defined in the metadata of each element.

I would like to create a blueprint that collects the location of the key in the metadata, then places the visibility key in the right place for each element in the sequencer.

Thank you!