The hyper grace teachers teach that all our sins, ( Past present and future ) have been forgiven
Well if you mean that our condemnation has been removed for our, present and future sins you are correct. It is called 'being justified (accounted righteous) for all our sins'. There is now, and always will be, 'no condemnation to those who are in Christ Jesus', for who will condemn?. Shall God Who justifies? Shall Christ Who died for us? *Rom 8.31.-34. For whom He justified, them he also glorified, (Rom 8.30). You are just totally ignorant of Romans.
So they don't need to repent or confess their sins.
We repented and confessed our sins in order to be justified (Rom 1.18-3.24). We must repent daily in order to receive our Father's forgiveness for grieving Him. (Matt 6).
Your problem in both cases is your lack of understanding of Scripture. Sometimes it speaks of forgiveness as over all (Acts 26.18). At other times it speaks of forgiveness for individual sins {Matt 6).
One well known hyper grace teachers said,
"When I sin, I'm blessed, because God isn't counting my sins against me.
He is both blessed because God does not count sins against someone He has justified (He does not unjustify them), and at the same time under conviction because he has grieved His Father,.,
He also said when he sins, He confesses he is rightous.
Because he is still justified he can call himself righteous before God because Christ is His righteousness. I presume he merely worded it badly,,
But the Bible says, when we sin, we confess our sins.
we all confess our daily sins because we have grieved our Father, but they no longer bring us under condemnation.
The difference between the Biblical grace and the hyper grace, is
There is no difference between God's grace and God's super grace. It is simply bringing out that it is the uttermost of grace. When God reveals His grace it is his utter compassion and mercy toward those who do not merit any of it. God's grace is total and complete. Grace is God acting in mercy and compassion to those who are undeserving of it.
You make the mistake of the Roman Catholics. You interpret it in the light of its secondary unusual meaning 'giving grace'. But when God shows His grace He is not 'giving grace', He is acting in grace, His unmerited love and favour. That is its primary meaning.
The Biblical grace gives us the power to overcome sin, and the hyper grace teachers grace give them the power to sin.
But when they are challenged, they say, "we're not saying that".
When God acts in grace HE gives us power to overcome sins. But He never gives us power to overcome ALL SIN. We are left to know our own weakness. When men claim to be wholly without sin they just mock God.