Jesus descended into Sheol to minister to those who were there, during the three days between Crucifixion and Resurrection.
Right. Sheol (Hades) was populated by the righteous (their faith reckoned to them as righteousness) and unrighteous dead prior to Christ’s sacrifice. The righteous in the “good” neighborhood of Hades (Abraham’s bosom) while the unrighteous were (and remain) in the “bad” part, in torment.
Jesus came and brought the righteous souls of Hades out and up to Heaven after His atoning sacrifice. The unrighteous remain in Hades until the time of final judgment (Revelations).
Hell (Lake of Fire) is not the same as Hades. Hell will remain unoccupied until the final judgment.