Conventional physics emphasizes experiments verifying objective reality but both quantum mechanics (QM) and originator of the multiverse hypothesis Hugh Everett suggest there's no such thing as objective reality.
Regarding QM - if quantum superposition is taken to its logical extreme, everything in the universe would affect everything else. Regarding Everett - his idea of the universal wavefunction says the observed and observer are all mixed together. These two references mean an experimenter's consciousness can never avoid influencing (technically, biasing) an experiment.
Physicists would be aware of these QM/Everett things but they seem to be unconsciously reverting to a classical view in which objective reality exists in all space-time, and not just in the limited perceptions of humans or animals. Our restricted senses (along with the limited technology and mathematics developed by humans to date) might view a quantum superposition where everything, including consciousness, fills all space and time very differently. For example - instead of occupying the whole of spacetime, a subatomic particle could be interpreted as being in more than one place simultaneously (this is what quantum physics says today).
If the existence of our science was separate from existence of the universe, there would indeed be objective reality for scientific theories to investigate. Suppose the accepted concept of time needs an additional component of not being purely linear but of being curvilinear. Future warping of space-time could modify that curve and form a circular time in which far distant centuries and millennia could directly connect with the remote past.
If a civilization is sufficiently advanced (advanced beyond our comprehension), the universe's origin is potentially artificial - without referring to religious beliefs. When circular time entangles science and technology from the distant future (observers) with a created universe (the observed), it'd be perfectly acceptable for objective reality not to exist and for experimenters to unavoidably influence experiments.
This is because studying the universe would have taught the observers how to do the wonders they perform. One of those wonders would be creating the observed cosmos whose fine-tunings would once again ultimately produce observers who'd produce the requisite cosmos. The cyclical nature of space-time would be transferred from current cosmology's repeated Big Bangs and Big Crunches to observers' future science constantly producing the observed universe.