Things he said:

• He's done a great job (which he has)
• A new administration
• He would hand over power to a new administration
• Thanked Mike Pence (why would he do that if he doesn't trust him?)
• The journey has just begun
• "The best is yet to come" (why would he say that if Biden would have power?)

Things he didn't say:

• The new administration is lead by Biden
• Congratulations Biden