According to SDA understanding did Methuselah preach just before the flood?

According to one comment from EGW (SDA) in Genesis 6 she lumps Methuselah and Noah together as having preached to the people prior to the flood. Here is the following quote from EGW on her comment on Genesis 6 below: "(1 Peter 3:18-21) God preached through Methuselah Noah and others-God granted them one hundred and twenty years of probation,and during that time preached to them through Methuselah,Noah and many others of his servants.Had they listened to the testimony of these faithful witnesses,had they repented and returned to their loyalty,God would not have destroyed them(The Review and Herald,April 23,1901)(1 BC 1088.4)" But according to the narrative in the previous chapter(Genesis 5) we are only told of Methuselah's genealogy and nothing else Genesis 5:21-27 ESV >21 When Enoch had lived 65 years, he fathered Methuselah. 22 Enoch walked with God[b] after he fathered Methuselah 300 years and had other sons and daughters. 23 Thus all the days of Enoch were 365 years. 24 Enoch walked with God, and he was not,[c] for God took him.25 When Methuselah had lived 187 years, he fathered Lamech. 26 Methuselah lived after he fathered Lamech 782 years and had other sons and daughters. 27 Thus all the days of Methuselah were 969 years, and he died. Looking up the genealogy of Methuselah, its clear that when Noah was building the ark Methuselah was still alive.There is no record of Methuselah building the ark with Noah or warning people about the coming disaster. So what is the basis for believing that Methuselah was also a preacher like Noah?