The Bible is supposedly God`s inspired word ,the Bible writers were inspired by God to write down what he wanted people to know. 2Pet.1:20,21...The entire Bible is inspired by God and beneficial, 2Ti.3:16,17 , Rom.15:4
In the hebrew scriptures ,O.T. God made his name Jehovah / Yahweh known under that inspiration and writings .
In the Christian Greek Scriptures, N.T. God see`s fit not to have the Tetragrammaton ,the four letters that represent his name in those writings ,why not ?
Because he wants his worshipers to focus on a new name ,a name that god says now is above every other name and that is the name Jesus.
Not Jehovah but Jesus.Ph.2:9-11 This is the inspired word of God we are reading.
So while God is using Jesus / Christianity as a means of reconciling people to God ,followers of Jesus /Christians should be focusing on and bearing witness to Jesus and Jesus alone ,not Jehovah .
It may very well be that after the one thousand year reign of Jesus Christ is over God will then want people to bear witness to himself Jehovah / Yahweh,but not before according to his inspired word.
For after the thousand years Jesus turns everthing back over to God