No one went to heaven before Christ ascended. The spirits or disembodied souls of the OT just and unjust went to one of the chambers of hell, Lk16. The just to the chamber of paradise, Abraham’s Bosom, the unjust to a chamber of torment.
Eph4:8 Wherefore he saith, when he ascended up on high, he led captivity captive, and gave gifts unto men. 9 (Now that he ascended, what is it but that he also descended first into the lower parts of the earth?
Our Lord descended into Hell bringing the good news when he preached to them.
[1Pt4:5 Who shall give account to him that is ready to judge the quick and the dead. 6 For this cause was the gospel preached also to them that are dead, that they might be judged according to men in the flesh, but live according to God in the spirit.]
CCC 634. [1Pt3:18 For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit: 19 By which also **he went and preached unto the spirits in prison;]
As far as prison, all in Sheol=hell are captives, even in Abraham’s Bosom. When one is marooned on a paradise island, he is a captive. He cannot leave that place, till rescued by his savior. When Christ ascended, he led a host of captives, the great cloud of witnesses.
The patriarchs all died, [Hb11:13 These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and **confessed that they were strangers and pilgrims on the earth. 14 For they that say such things declare plainly that they seek a country. 15 And truly, if they had been mindful of that country from whence they came out, they might have had opportunity to have returned. 16 But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their GOD: for he hath prepared for them a city.]
There will be new heavens [Universe] and earth. A heavenly universe and a heavenly earth, they will be transformed just as our resurrected bodies will be transformed into heavenly bodies. God will dwell with men in the New Heavenly Jerusalem. Heaven and creation will be united as one.
[Hb11:37 They were stoned, they were sawn asunder, were tempted, were slain with the sword: they wandered about in sheepskins and goatskins; being destitute, afflicted, tormented; 38 (Of whom the world was not worthy: ) they wandered in deserts, and in mountains, and in dens and caves of the earth. 39 And **these all, having obtained a good report through faith, received not the promise: 40 God having provided some better thing for us, that they without us should not be made perfect. Hb12:1 Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us,]
[Acts1:9 After he said this, he was taken up before their very eyes, and a **cloud hid him from their sight.]
Christ took the just spirits, disembodied, souls, in Sheol=Hades=Hell into heaven. Now made perfect by the blood of Christ. [Hb10:4 For it is not possible that the blood of bulls and of goats should take away sins].
[Hb12:22 But **ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels, 23 To the general assembly and church of the firstborn, which are written in heaven, and to God the judge of all, and to the spirits of just men made perfect, 24 AND to Jesus the mediatory of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.]
We see the spirits of just men made perfect now in heaven with our Lord, waiting the resurrection of their bodies at the end of time. The souls of the unjust are still in hell=sheol=hades, waiting the resurrection of their bodies. Which body and soul united again will be cast into the lake of fire alone with Hades and death