I think I saw you can do the reverse, (copy the master section plugins to the montage master FX tab) but not the other way.
I don’t think so, but you can now select-all, copy and paste whole chains between each of the montage plugin areas: clip, track, and montage master, and even to other montages, if that’s any help. Easier than saving and loading chains.
But you can’t do it to the Master Section as far as I can tell, even with saving and loading.