Despite his efforts to outright coup the election, Donald Trump is scheduled to lose access to the POTUS account as of Inauguration Day in January. According to reports, Twitter.com has already begun the process with the records department of the government & the National Archives. Twitter confirmed (see here) that they would transition the account no matter what Trump has been saying about the election results.
On a number of occasions, studies have found that there was no sign of voter fraud in the most recent election. In fact, in GA where Trump notably claimed such the election was re-audited and still given to Biden.