Thisis not accurate.
VP is sworn in first - Biden and harris swore in much earlier than customary, but VP going first it not against custom.
Oath of office
At 11:54 a.m., Associate Justice Clarence Thomas swore in Mike Pence as the 48th vice president of the United States, with Pence's hand on his personal Bible as well as the Bible of Ronald Reagan, the politician who inspired Pence to join the Republican Party. A performance of "America the Beautiful" by The Tabernacle Choir at Temple Square followed. At noon, Trump became the 45th president of the United States, taking the oath of office with Chief Justice John Roberts. Trump was also sworn in using two Bibles, a Bible his mother gifted him and the historic Lincoln Bible. After the swearing-in, the Marine Band performed "Hail to the Chief" and Trump received the traditional 21-gun salute in his honor.[61][62][63][64]
https://en.wikipedia.org/wiki/Inauguration_of_Donald_Trump#Ceremony