I found another young boy (looks like a black boy) in a white sailor suit (and white collar and hat) in episode Das Gold der Geiermeiers (1998). Clip title Fratz Fantom - Video. The video is very short (<2 min). I haven't found the full episode. So not sure how many scenes or if there are more actors.
I'm always watching the 2 rebroadcasts on weekends on ORF . Up to now, no more Lederhosen or sailor suit scenes. I also check regularly for new uploads on YouTube.
Rating 2 for now for this episode.
Main entry here, rating up to 5 (incl Lederhosen) and rating 7 on my overalls blog
https://sailorsuitsandlederhosenfilmblog.blogspot.com/2022/05/tom-turbo-1993.html