This isn't a criminal case, it's a civil case.
The case has already been decided. They are just trying to assertain the punishment.
If it was a criminal trial, and had not already been decided, Trump still can be removed from the courtroom.
(b)
In General. A defendant who was initially present at trial, or who had pleaded guilty or nolo contendere, waives the right to be present under the following circumstances:
(1) In General. A defendant who was initially present at trial, or who had pleaded guilty or nolo contendere, waives the right to be present under the following circumstances:
(A) when the defendant is voluntarily absent after the trial has begun, regardless of whether the court informed the defendant of an obligation to remain during trial;
(B) in a noncapital case, when the defendant is voluntarily absent during sentencing; or
(C) when the court warns the defendant that it will remove the defendant from the courtroom for disruptive behavior, but the defendant persists in conduct that justifies removal from the courtroom.
www.law.cornell.edu
Rarely have I seen a post fail on so many levels. Can you do me a favor and link the right wing blog that fed you this information so that I can help you identify when you are likely being lied too?