It is my belief that there will be two separate times/chastisements. The first, has begun and will intensify and will lead to the concertation of Russia, Our Lady's Triumph and a period of peace she promised. During this period , the Catholic Church will be completely restored and humanity will be as it should.  I believe this period will last about generation or so. Then people will become lax again, and THE Antichrist will enter into the stage.  The second and greater chastisement will happen during this time. This is when the three days of darkness will happen in which Christ will clean all evil from the earth.  After the three days, everybody who survives will look out and Christ will be seen by all.  He will them set up his new kingdom on earth. I could be wrong, but thats my take on everything.  Either chastisement is not going to be fun to live thru, but there is hope and greatness at the end of each.

Yes, As I said, there will be two different chastisements. The first ushers in the Triumph of Our Ladies immaculate Heart which will be followed by Our period of Peace she promised.  After that period or near the end of it, (about a generation) THE antichrist will appear and will come the second chastisement  the end of the world as we know it.    

In my very unformed, unscholarly opinion, but based mainly on observation, some reading, and logic:
If Covid and suppression of the sacraments is not at least a precursor to a more severe chastisement, I can't imagine what the 'first" chastisement will look like.  This is, to me, a significant chastisement, particularly since it is global and not confined.  Precursors to it were the demonic involvement in extreme climate situations of a character we have not seen before (what were called, even by atheists, apocalyptic conflagrations, floods, tornadoes, violent surf in unprecedented manifestation and repetition). Couple that with disorder in the animal world and in the skies, and these combined "natural" (unnatural) phenomena are signs that the battle between Good and Evil is at least warming up, if it hasn't actually started.

Next phase, from my reading:
Worldwide Illumination of Conscience

followed by:
3-6 months (I forget which) for mankind to Get It Together

followed by:
Period of peace, about 20 years

followed by:
3.5-year reign of Antichrist

followed by:
Second Coming

I do believe that after the period of peace there will be other chastisements, but I don't know if those are supposed to be before or during the reign of Antichrist.  

I do not know what "the tribulation" is.  Someone could inform me.

I don't personally believe in the Warning or Illumination of Conscience part.  I believe that came initially from Garabandal, but I consider Garabandal to be diabolical in origin.  There have been several failed prophesies tied to those visions and visionaries that render them lacking in credibility.