Many aspects of the law did change.You must understand that the Gentiles were not in covenant with God to obey the law.
In the first century if TMS wanted to join that former covenant then TMS had to be circumcised.
That's was the law in Israel and that is not negotiable.
To obey the law including the Sabbath you had to be circumcised first.
That's what Acts 15 was all about; do Gentiles need to be circumcised first?
That was what the law specified.
If you don't think circumcision was necessary then the law must have changed.
The changes were foretold in Dan 9
It does not mean all the laws were changed. When did "not taking the Lord's name in vain" ever change?
The laws of ordinances were nailed to the cross.
The moral laws are still kept today.