That's because you have no idea what the new covenant is.
You reject clear and simple scripture that a child can understand.
The new covenant is the shed blood of Christ - all those in Him are in the new covenant. That is clear and simple Scripture
Eph 2
13 but now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ. 14 For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us; 15 having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace; 16 and that he might reconcile both unto God in one body by the cross, having slain the enmity thereby: 17 and came and preached peace to you which were afar off, and to them that were nigh. 18 for through him we both have access by one Spirit unto the Father.
19
Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God; 20 and are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone; 21
in whom all the building fitly framed together groweth unto an holy temple in the Lord: 22 in whom ye also are builded together for an habitation of God through the Spirit.
Heb 3
1 Wherefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our profession, Christ Jesus; 2 who was faithful to him that appointed him, as also Moses was faithful in all his house. 3 For this man was counted worthy of more glory than Moses, inasmuch as he who hath builded the house hath more honour than the house. 4 For every house is builded by some man; but he that built all things is God. 5 And Moses verily was faithful in all his house, as a servant, for a testimony of those things which were to be spoken after;
6 but Christ as a son over his own house; whose house are we, if we hold fast the confidence and the rejoicing of the hope firm unto the end.
Romans 11:27
for this is my covenant unto them, when I shall take away their sins.
Hebrews 12:24
and to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.
20 Now the God of peace, that brought again from the dead our Lord Jesus, that great shepherd of the sheep, through the blood of the everlasting covenant, 21 make you perfect in every good work to do his will, working in you that which is wellpleasing in his sight, through Jesus Christ; to whom be glory for ever and ever. Amen.
Matthew 26:28
for this is my blood of the new testament, which is shed for many for the remission of sins.
1 Corinthians 11:25
After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
2 Corinthians 3:6
who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
Heb 9
11 But Christ being come an high priest of good things to come, by a greater and more perfect tabernacle, not made with hands, that is to say, not of this building; 12 neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us. 13 For if the blood of bulls and of goats, and the ashes of an heifer sprinkling the unclean, sanctifieth to the purifying of the flesh: 14 how much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God?
15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance. 16 For where a testament is, there must also of necessity be the death of the testator. 17 For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth. 18 Whereupon neither the first testament was dedicated without blood. 19 For when Moses had spoken every precept to all the people according to the law, he took the blood of calves and of goats, with water, and scarlet wool, and hyssop, and sprinkled both the book, and all the people, 20 saying, This is the blood of the testament which God hath enjoined unto you. 21 Moreover he sprinkled with blood both the tabernacle, and all the vessels of the ministry. 22 And almost all things are by the law purged with blood; and without shedding of blood is no remission.
23 It was therefore necessary that the patterns of things in the heavens should be purified with these; but the heavenly things themselves with better sacrifices than these. 24 For Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself, now to appear in the presence of God for us: 25 nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others; 26 for then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself. 27 And as it is appointed unto men once to die, but after this the judgment: 28 so Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.