EDIT : I made significant changes to the question which is by its nature open.
Dark energy and its repulsive energy that expanded space at its origin was decisive in creating the playground for the laws of nature and particles by menas of cooling and keep expanding at certain rates.
Mastering Dark energy has the power to shape the size of space and thus what it does with (imagine space would have been keept at a minuscule size or expand at infinite speed, the particles and associated laws would have been different).
Dark Energy does not interact with matter and increases and decreases the expansion of space (exerting negative pressure expanding the elastic fabric of space). Its energy remains constant (does not weaken) with the expansion of space and is not associated with regular matter as per its dynamics so it may be a property of space (vacum energy) or maybe independent of it and exert a force on it as so far Dark energy only intereacts with Space via its changes in acceleration. My guess is that is a non constant property of space and maybe related to the vacum of space and its energy content (E=M) However there is a large discrepancy "vacumm catastophy" where vacuum energy in a cubic meter of free space has been estimated to be 10−9 joules (10-2 ergs).However, in both Quantum Electrodynamics (QED) and Stochastic Electrodynamics (SED), consistency with the principle of Lorentz covariance and with the magnitude of the Planck constant requires it to have a much larger value of 10^113 joules per cubic meter. A monstruous amount of energy (Total energy of the universe is estimated to be 4×10^69 Jules).
Previously of space and time which must also been created at one point there must have been energy potential or virtual and as result of something must have becomed real. My believe is that dark energy has some sort of flavour of being a relic force from the pre-universe era (no time then) from that era of energy potential in the way it intereacts with space (same amount per cubic meter regardless of expansion however seems to be constant as per unit of new space and time created as per expansion) However we dont know if it was always like this possibly not as through its effects we can see by changes in acceleration or are that variations in the expansion are due to changes in the constant of time at a plank scale at a universal scale what we perceive as inflation, expansion and now acceleration.
I am trying to understand how to create a universe as to develop worldbuilding capabilities from a scientific point of view although I understand that is highly speculative science.
Therefore the question is if there could be an external force to our space and time influencing or modifying our space and time? and what force could that be and what possible mechanisms of transmision to our universe will it have to use as to affect time and space.