It is clear what the 70 weeks are about.
Seventy Weeks and the Messiah
24 “Seventy weeks [of years, or 490 years] have been decreed for your people and for your holy city (Jerusalem),
to finish the transgression,
to make an end of sins,
to make atonement (reconciliation) for wickedness,
to bring in everlasting righteousness (right-standing with God),
to seal up vision and prophecy and prophet,
and to anoint the Most Holy Place.
If just one of the above is fulfilled, then they all are in 70 weeks.
Has Jesus made atonement and brought us into right standing with himself and opened up the way into the Holy place?
Heb 9
11 But when Christ appeared as a High Priest of the good things to come [that is, true spiritual worship], He entered through the greater and more perfect tabernacle, not made with hands, that is to say, not a part of this [material] creation. 12 He went once for all into the Holy Place [the Holy of Holies of heaven, into the presence of God], and not through the blood of goats and calves, but through His own blood, having obtained and secured eternal redemption [that is, the salvation of all who personally believe in Him as Savior].
13 For if the sprinkling of [ceremonially] defiled persons with the blood of goats and bulls and the ashes of a [burnt] heifer is sufficient for the cleansing of the body, 14 how much more will the blood of Christ, who through the eternal [Holy] Spirit willingly offered Himself unblemished [that is, without moral or spiritual imperfection as a sacrifice] to God, cleanse your conscience from dead works and lifeless observances to serve the ever living God?
15 For this reason He is the Mediator and Negotiator of a new covenant [that is, an entirely new agreement uniting God and man], so that those who have been called [by God] may receive [the fulfillment of] the promised eternal inheritance, since a death has taken place [as the payment] which redeems them from the sins committed under the obsolete first covenant.
24 For Christ did not enter into a holy place made with hands, a mere copy of the true one, but [He entered] into heaven itself, now to appear in the very presence of God on our behalf; 25 nor did He [enter into the heavenly sanctuary to] offer Himself again and again, as the high priest enters the Holy Place every year with blood that is not his own. 26 Otherwise, He would have needed to suffer over and over since the foundation of the world; but now once for all at the consummation of the ages He has appeared and been publicly manifested to put away sin by the sacrifice of Himself. 27 And just as it is appointed and destined for all men to die once and after this [comes certain] judgment, 28 so Christ, having been offered once and once for all to bear [as a burden] the sins of many, will appear a second time [when he returns to earth], not to deal with sin, but to bring salvation to those who are eagerly and confidently waiting for Him.
Beware of those who suggest we are still in our sins by placing the 70th week of atonement in the distant future.
When Jesus comes a second time will he deal with sin?
Clearly not, as he already did in what must have been the 70th week.