Sure! If he enters the Chained God's quarters (no matter what happens with the Chained God), he'll notice there are two sets of energies: one belongs squarely to the Chained God and is chaotic, feverish/hot and fire-connected; the other type of energy is cold and emanating from the cracks in the ground, which have spawned thin rivulets of dark water. Notably, the water from the shard would send the jar rattling, threatening to explode (this can be avoided if Wrath forces the lid shut) and join the water in the rivulets.

Both energies feel chaotic, but the Chained God's feel destructive, the dark water feels constructive, (un)life-bearing.

Some things Wrath can notice here:
— while the dark water in the rivulets is the same overall type of dark water as the one in the shard, it's blended in with the energy of the Chained God

— given that the dark water is slowly but surely appearing and drowning the room, it is assimilating the Chained God's energy, not the other way around, nor is this a perfect merger/union

— yes, the dark water is eating up a gd god.