‘scholar’:
Each one of the Synoptics show the following pericope that immediately after those events that there would be celestial events accompanying the appearance of the Son of Man which clearly did not occur in the first century with the events at the time of Jerusalem's destruction.
The fact that some things they expected to happen didn’t happen isn’t evidence that it will happen at a later time. They were just wrong.
It’s also amusing that you recognise that the ‘celestial’ signs were supposed to happen after the ‘tribulation’ but ignore the fact that Jesus’ presence is supposed to happen after those ‘signs’.