Joe Biden was not on the ballot, so New Hampshire is counting write-in votes, and that tabulation is taking a long time.
Politico reports
Joe Biden write-in
54,570 - 51.5%
Unprocessed write-in
21,550 - 20.3%
Dean Phillips
20,976 - 19.8%
Marianne Williamson
5,016 - 4.7%
Other candidates
3,845 - 3.6%