It has certainly been my opinion that that was the function of the 144000...as soon as they appear and witness, whole multitudes of folks appear to be saved out of the tribulation period.
That is what I believe too. Another person commenting said that these 144,000 will help Jesus govern for 1000 years, and they may. However, in Rev 7, it clearly shows that they are on Earth with God’s seal and that they delivered many people.