Evolution is a widely accepted fact, which must be proven to be correct in order to be accepted as fact.
You seem to confuse the facts of evolution with the theory of evolution.
Facts are the observations, the data.
The theory is the proposed mechanism that underpins and explains that data.
Just like how there is the fact of gravity (we fall to earth and don't shoot into space - the force of gravity is very much a factual reality). And then there is the
theory thereof: what is it, where does it come from, how does it work?
The theory can actually be wrong - but the facts would remain.
If the theory turns out wrong, one would require another theory to explain the facts.
The facts of evolution indeed are things like speciation (factually occurs), common descent of species (genetic fact), etc. That species change over time is also a fact, as shown in the fossil record.
That evolution (= the changing of species over time) occurs, is a fact.
The
theory of evolution, proposes a mechanism that explains
how this occurs, how it works (natural selection etc).
The theory could be wrong (unlikely, but it could), yet the facts would remain. Speciation still factually happens. Species still factually share ancestors, etc.
Evolution would still occur. We'ld simply be wrong about the mechanism that underpins it. We'ld require a
new theory of evolution.