(Luke 21:22 because these are days of vengeance, to fulfill all that is written.)
Luke 21:22 is not saying THIS is the SUM TOTAL of all of prophecy.
It is saying, THIS ASPECT must ALSO be [have been] fulfilled (at this time), in order for "ALL" prophecy (that is written) to be fulfilled. There is to be no skipping over some of it to get to the conclusion [/the concluding aspects] of it. That is the point of this sentence in v.22.
Here's what I'd written in a different post/thread, on
Acts 3 (the other part of your post):
[quoting my post]
Acts 3:21 [speaking to
"ye men of Israel," v.12 (unsaved persons as noted in v.13-15,17,19)] then states: "whom indeed it behooves heaven to receive
until the time
s of restoration
of all things of which God spoke by the mouth of His holy prophets from the age." [in contrast to that which He had theretofore kept "hidden in God"/was
as yet undisclosed]
In vv.13 and 26 the phrase "His
Servant Jesus" (they had not been expecting the "suffering servant" aspects of His Person, only the "reigning-in-power King" aspects, though both aspects had been prophesied in the OT; chpt 3's point is Peter telling them they'd overlooked the former of these two aspects ['His Suffering Servant'], and thus had a hand [themselves] in fulfilling that very thing, vv.13-15), but this was not saying that "everything" was at this point in time (the time of Acts 3)
fully fulfilled; and...
...there are TWO "raise" senses spoken of in Acts 3... v.15 speaking of His being "raised from the dead," but the other being "raised" to a position of prominence BEFORE His death (that is, to the position of
'a Prophet like unto Moses'...'raise up
unto you of your brethren like unto me [/Moses]; him shall
ye hear in all things whatsoever he shall
say unto you' and '
UNTO YOU FIRST God, having raised up [to a position of prominence BEFORE His death] His
Servant Jesus,
SENT him to bless
you, in turning away
every one of you from his iniquities'). The "ALL things
which God spoke by the mouth of His holy prophets" (meaning, OT prophecies) have not yet been fully fulfilled, but remain for a
yet-future time
[His "death" and "suffering" was the aspect they had missed/overlooked...
additionally, there were some things that it was necessary for God to "keep hidden" ("hidden in God") until
AFTER His "death/resurrection," per 1Cor2:7-
8]
[end quoting that post]