The Trump campaign has spent the weeks following the 2020 presidential election sowing doubt about the outcome on any and every platform it can, claiming widespread voter fraud changed the results without ever presenting enough evidence to sway even Trump-appointed judges in any of 50+ court cases.
So while Trump has given his social media accounts and his caps lock button a workout, repeatedly claiming the election was "rigged," platforms like Twitter and Facebook have largely resorted to merely adding disclaimers to his posts, flagging them as containing untrustworthy information.