A Pantelist - extreme hyper grace - interpretation (reading into the text) of 2 Cor.5:19 that has been expressed on these forums is that the world’s sins - past, present & future - have been forgiven already. This is like the hyper grace doctrine of the likes of Joseph Prince, except Prince limits the forgiveness of all sins (past, present & future) to believers, i.e. Christians. Hence the label “extreme hyper grace” for this Pantelist opinion of 2 Cor.5:19.
There is a principle of bible interpretation that says to interpret difficult, unclear or obscure passages in light of the clear statements of Scripture. IMO if we interpret the difficult passage of 2 Cor.5:18-6:1 in light of the rest of the New Testament, there are clear passages that indicate that forgiveness of sins is conditional. So 2 Cor.5:19 should not be understood as supporting the extreme hyper grace position.
Acts 3:19 Repent, then, and turn to God, so that your sins may be wiped out, that times of refreshing may come from the Lord,
Col.1:13 For he has rescued us from the dominion of darkness and brought us into the kingdom of the Son he loves, 14 in whom we have redemption, the forgiveness of sins.
1 Jn.1:9 If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.
Eph.1:7 In Him we have redemption through His blood, the forgiveness of our trespasses, according to the riches of His grace,
Acts 2:38 Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins, and you will receive the gift of the Holy Spirit.
1 Jn.1:7 But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin.
Acts 10:43 All the prophets testify about Him that everyone who believes in Him receives forgiveness of sins through His name.