There is nowhere in the NT that says Repent of your sins it is not there.
KJV Acts 3:19 Repent ye therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord;
Lack of it leads to damnation:
KJV Galatians 5:19 Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, 20 Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, 21 Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
Lack of Turning around going the other way. Change of heart change of direction without not repentance there is no conversion there is no good news period.
so is this one of the reasons so many churches today embrace homosexuality and abortion? Can a Christian accept abortion and live a gay lifestyle but still feel confident in the no need to repent doctrine?