That not really true.
ToE is basically various types of plants, animals, and other living things have their origin in other preexisting types and that the distinguishable differences are due to changes in allele frequency over time.
That's what iit means in biology. You'll note it says nothing about origins.
That’s not Darwin’s theory.
Which is progressive small change , and he notes that as the falsification criteria for his( so called) theory.
You are talking common descent,
a different thing altogether, which assumes a single start .
But if life was a chemical process the default assumption must be multiple starts. . Even Darwin rules out the ability to definitively say either way on that.
But no experiment can ever be conducted to show all life came from either of them , so are they even hypotheses?
Then there is survival of fittest etc,
Various molecular genetics theories, etc.
More besides.
All part of , hypotheses of, of theories of evolutin,
Will the real ToE please stand up?
The point is there is no single ToE if it’s a theory at all.
There is just a mush of definitions , bits of theory , some hypotheses and assumptions , and pure conjecture filling in gaps that is Called “ evolution”