The arrest of a juvenile is not like that of an adult, and does not require a visit to the station, fingerprinting, etc, or even for charges to be filed. An officer can arrest a kid and then set them free after scolding them. However, it does require the juvenile to be notified of their rights, and to notify the kid’s legal guardians (which happened).
If the officer reported that the kid was arrested, then there is an arrest report. If not, there isn’t. It depends of what the officer decided to do.
@Mbappe321 Besides checking whether there was an arrest report, you should check the rules in your state regarding sealing or expunging juvenile records.