https://www.siliconvalley.com/2020/11/22/update-1-twitter-facebook-to-hand-over-potus-account-to-biden-on-jan-20/

Twitter Inc and Facebook Inc will transfer control of the @POTUS account to the Joe Biden administration on Jan. 20, the social media companies said on Saturday.

The @POTUS account on both platforms is the official account of the President of the United States. It is separate from the@realDonaldTrump Twitter account and the @DonaldTrump Facebook page that U.S. President Donald Trump mostly uses to write his posts.