Something exists
Effects are happening.
Something is making a difference. Something has the power to bring effects about. Whatever that something is, it exists.
This framework calls that foundation substrate-energy.
Not energy as the number physics gives us when we measure how much energy something has, which is Noether-energy. Noether-energy is already downstream because it's a measurement of something.
Substrate-energy names what the number is a number of: the underlying reality that has the power to produce effects at all.
So the first claim is simple:
Reality has a foundation that exists, and to exist is to have the power to make a difference.