..
That assertion has to be proven.
(An explanation on what you mean by temporal context would also be grate)
In modern physics, "time" is considered an intrinsic part of the dimensions of the universe.
It's called
space-time for a reason you know.
This logically means that if you remove the universe form existence, you effectively remove both space
and time.
Secondly, causality is an aspect of the physics
of the universe. And not even universal at that. It really only applies on the classical macroscopic level. Once you are talking about quantum levels, not so much.
Anyhow, once again: remove the universe = remove the physics of the universe.
When talking about the origins of the universe, we are discussing a context where
the universe does not exist. Logically, you can't invoke inherent parts of the universe in that context, since they don't exist either - the universe needs to exist for those inherent parts to exist.
Temporal context: a context where time exists; where time flows.
Causality requires the flow of time, as causes happen
before effects.
In every sense of the word, in context of modern physics, you can't logically invoke "causality" to address the origins of the universe, as "causality" as we know it
requires the universe to exist.