1. The theory of evolution applies as long as life exists. How that life came to exist is not relevant to evolution. Claiming that evolution does not apply without a theory of abiogenesis makes as much sense as saying that umbrellas do not work without a theory of meteorology.

2. Abiogenesis is a fact. Regardless of how you imagine it happened (note that creation is a theory of abiogenesis), it is a fact that there once was no life on earth and that now there is. Thus, even if evolution needs abiogenesis, it has it. Via