The fact that no title is called in a VTS does not mean that the menu of that VTS cannot be called. The Root/Audio/Subpic... menus can be called from the VMGM, just like a Title.
We have not enough information to know how to jump to the VTSM 2. First, you would like to go to that menu when what is playing? A title in VTST 2, or in another VTS? It it's form another VTS, is it already a RootM in that VTS? Have you verified if you can reach it with the PgcEdit virtual player's Root Menu button, even if that menu has no video?
Have you verified the PUOs?
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