The unfallen angels, if judged at all, must be judged for their misdeeds, and since we have and can have 0 knowledge about angelic peccadilloes, then we’d rather relegate this judgment completely to Christ who created those angels and breathe free with no care about this matter.
Still, it is unfathomably weird to imagine how the Archangel Michael gets drunk and forgets to fulfill Christ’s command, and then comes to Him with a sheepish guilty smile for asking a forgiveness, or how a cherub gets in a heated confrontation against a seraph on the issue of who is greater Ronaldo or Mes… oh, sorry, St Patrick or St Benedict, and they punch each other and have few of their six wings broken, their feathers scattered all around the Heaven, for which they get a temporary suspension from their heavenly duties.