There are precursors for space and time outcomes in the agency and free choice that all, of course, simply exist in a quantum causal set. However, there are many outcomes in a quantum causal set that have unknowable precursors even though those precursors do also exist in the causal set. There are unknowable quantum precursors that make quantum outcomes fundamentally uncertain and therefore subject to the free choice of conscious agents in our quantum reality. Nevertheless, the collapse of quantum phase coherence means that some outcomes are still much more likely than other outcomes and that is the basis of the largely determinate classical reality of complexity and chaos.
The term quantum spacetime is somewhat of a misnomer since the gravity outcomes of a determinate spacetime relativity are fundamentally inconsistent with the uncertain outcomes of quantum charge. While a unidirectional and entropic time and space are objective determinate outcomes in relativistic spacetime, quantum time and space are reversible and allow for both superposition in one place and time as well as entanglement of simultaneous outcomes across time and space.
Free choice is just one of the many emotions that are necessary precursors for subconscious archetypes. Subconscious archetypes are unknowable precursors but are still part of the universe and therefore also lead to free choice outcomes. People tell all kinds of stories about the subjective precursors of the objective outcomes of unconscious archetypes, but there is no way to objectively measure unconscious archetypes, despite their being precursors to the outcome of free choice. The universe is very complex and our limited and finite minds cannot ever hope to know all of the complexity of even knowable determinate precursors. Therefore many very smart people will continue to argue that complexity and chaos alone are what explain free will in a determinate universe and there is no quantum uncertainty involved.
However, uncertain quantum outcomes mean that the universe is not really determinate after all and so given quantum uncertainty, even beyond complexity and chaos there are still fundamentally uncertain outcomes with unknowable precursors. The key difference between the outcomes of the determinate relativity of gravity and the uncertainty of quantum outcomes is in quantum phase. While the single photon exchange of quantum charge results in uncertainties in noncommuting position and momentum, the biphoton exchange of quantum gravity results in uncertainties in anticommuting position and momentum.