I don’t believe God granted me any such right. “Thou shalt not murder” in Exodus 20:13 and Deuteronomy 5:17 (never mind Mark 10:19 and Luke 18:20) are quite clear, and they do extend to self-murder since you didn’t give yourself your own life.
The Bible tells us to do many things that are not and indeed can not be encoded in law.
There is no way to make coveting against the law and yet it is right there in Exodus 20:17. It says that we should love the Lord with all our heart and love our neighbor as our self but there is no way to encode that in law either.
There have been several attempts to encode a law against suicide. They have never worked because in the end people do have the right to kill themselves.
Where suicide is against the law people tend to have strange "accidents" instead so it is not recorded as suicide.
It was my sad obligation to attend the funeral of a young man who, "slipped off a ladder and became entangled in a rope". The law against suicide did nothing but prevent him from getting help with his depression. If he had been committed as a suicide risk he would have promptly been arrested. Being in jail does little to help a depressed person.
Where law has worked is that they do not have the right to drag other people into it.