There is no evidence for a cyclical universe, like there is no evidence about anything else that could have happened before the matter of the observable present universe had a temperature in the range of tens of MeV.
Like I have said, one can hypothesize that before that state when the temperature was in the range of tens of MeV the matter had been even hotter, or on the contrary, that it was cooler, but either way there is no evidence for any earlier conditions and whichever extrapolation is chosen it eventually reaches things that cannot be explained, e.g. if the evolution had been cyclical, why it has reversed, or if the matter was hotter, why it was surrounded by an empty space, allowing expansion and adiabatic cooling, or if it was cooler either whence the extra energy came or what could have caused an adiabatic compression.
So my opinion is that for now any discussion about what could have happened before the moment of time when the temperature was in the range of tens of MeV and there were no other antiparticles besides positrons and antineutrinos and no other abundant hadrons except free protons and free neutrons is a waste of time, because being unverifiable any theory about that time is non-scientific, unless someone would discover a really new theory about the structure of matter, significantly better than anything that has been proposed during the last century, which could offer additional insight.
Like I have said, one can hypothesize that before that state when the temperature was in the range of tens of MeV the matter had been even hotter, or on the contrary, that it was cooler, but either way there is no evidence for any earlier conditions and whichever extrapolation is chosen it eventually reaches things that cannot be explained, e.g. if the evolution had been cyclical, why it has reversed, or if the matter was hotter, why it was surrounded by an empty space, allowing expansion and adiabatic cooling, or if it was cooler either whence the extra energy came or what could have caused an adiabatic compression.
So my opinion is that for now any discussion about what could have happened before the moment of time when the temperature was in the range of tens of MeV and there were no other antiparticles besides positrons and antineutrinos and no other abundant hadrons except free protons and free neutrons is a waste of time, because being unverifiable any theory about that time is non-scientific, unless someone would discover a really new theory about the structure of matter, significantly better than anything that has been proposed during the last century, which could offer additional insight.