How does magnetic flux relate to space-time Curvature?

Answer 1

the magnetic flux exists INSIDE space-time. ( not separately )

therefore it follows the curvature of space-time.

an example of this is LIGHT, which is partly a magnetic field.
Light will bend due to gravity ( a curvature of space time ) because it follows the medium ( space time ) in which it exists.

thanks :)

Answer 2

The mag. flux lines will follow along the space-time curvature lines, just like electric field lines do.