In the Lutheran Church they practice absolution of sins.
The minister usually asks the congregation to repeat a confession after him.
When they are done, he says something to the effect of; “By the power given to me as a minister of the Gospel, I declare that your sins are forgiven.”
One of the go to verses that they go to for this, is John 20:23.

In my 42 years as a believer, I have never seen this done anywhere but in a Lutheran Church and I have visited a lot of Churches over the years.
This includes confessional Churches in the Presbyterian tradition and confessional Churches in the Baptist tradition.

Reading confessions is a great practice; but is it right for the the minister to declare everyone’s sins forgiven because they repeated a confession?
According to Lutherans they rightly say that only through faith in Christ can one have their sins forgiven.
Yet they say that when someone says the confession, they have placed their faith in Jesus and that is the basis for the minister being able to absolve them of their sins.

Am I wrong to believe this is unbiblical?
Am I missing something?