The absence of a grave is absence of proof that we are wrong. It’s not proof that we are right.
What suggests the early opinion of SOMETHING uniquely remarkable is the absence of relics of Mary.
And, just to be clear, the Assumption leaves undefined whether Mary died or not. Whether or not she did, the dogma I that she “now” enjoys the full resurrection which all the saints will enjoy at the end.
No relics/ no grave
Mary went straight up
No relics/ no grave
Mary went straight up
If Mary had relics - we would know
God (the Father) made sure we were not about to touch his beautiful woman