Whether the appeal was admissible against the pre-trial refusal to appoint official counsel to the private complainant.
No. Such a procedural order by the trial court president cannot be attacked by appeal and may only be reviewed with the final judgment.
Under Arts. 393(1)(b) and 65 CPP, interlocutory procedural orders of a first-instance court or its president are generally not separately appealable unless the Code expressly provides otherwise. Art. 136 CPP does not create such an appeal route.