so as sidshila is not a physical place there is no need to be at the edge of universe, as it is state of soul

Yes, you’re touching an important Jain idea. Siddhashila is not a mere geographic “edge of the universe” you could reach by travel; it is the realm where liberated souls (siddhas) reside after they have shed all karma.

Key points:

• Siddhashila (often called Siddha-loka) is the abode of those who have achieved moksha—the souls are pure and bound by no further karma.
• It is described in Jain cosmology as a special, pure region that lies beyond ordinary worldly realms. Some descriptions say it is at the top of the cosmos; others say it is a state/location beyond the material dimension. In all cases, it is not accessible to beings still bound by karma.
• For Digambar and Śvetāmbara traditions, the essence is the same: siddhas live there in perpetual bliss, free from rebirth, while the material universe continues for us ordinary beings.

In short: Siddhashila is the state/realm of liberated souls, not a place you visit as an ordinary traveler, and it is not simply a metaphor but a doctrinal location/state in Jain cosmology.