it turns out to be "about" much more than just the will

[sitifan]

In desperation her lawyer, Hope Beneke, hires the close to down-and-out Van Heerden, and the stage is set for a mad hunt for the will as the clock ticks down. Of course, it turns out to be about much more than just the will -- it was a big walk-in safe, so there was room for a lot in there, and the man Wilna van As wasn't married to turns out to have not quite been what he seemed. But then this is a book (and a country, South Africa), where the past and past deeds often weigh heavily on characters, and prove hard to escape.
https://www.complete-review.com/reviews/trcrime/meyerd1.htm
What does the word 'about" mean in the clause in bold?

 

[Barque]

It means "regarding" or "in respect of".