lol, In Matthew 24:3 KJV I don’t think they thought "second coming" They were thinking him ruling in the land as king the same way all Jews did and were curious how all that would be fulfilled if Jerusalem was destroyed.
The same exact point then though,bare in mind in Acts 1-3 the temple and Jerusalem have not yet been destroyed, and they are saying if they would repent that he would return Acts 3:20 KJV ,,,so whether they saw Jesus in his first or second coming they still believed that he would in fact return as the king and rule over Israel and all other nations would bow to it.
Nope - Acts 2 and 3 have a difference in their perspective by then, that is not yet as fully developed in Acts 1.
Matthew 10:19 But when they deliver you up, take no thought how or what ye shall speak: for it shall be given you in that same hour what ye shall speak. 10:20 For it is not ye that speak, but the Spirit of your Father which speaketh in you.
That is a description of things after Acts 2's Pentecost.
Which would have cleared the following up.
Matthew 10:23 But when they persecute you in this city, flee ye into another: for verily I say unto you, Ye shall not have gone over the cities of Israel, till the Son of man be come.
Their perspective was now the Spirit's perspective.
Acts 2:1 And when the day of Pentecost was fully come, they were all with one accord in one place.
Acts 2:4 And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
Anyone who concludes they were wrong, or confused in Early Acts, or some other nonsense, is an incompetent spelled I-N-T-E-R-P-L-A-N-N-E-R.
Plain and simple...
Acts 4:7 And when they had set them in the midst, they asked, By what power, or by what name, have ye done this? 4:8 Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel,