well I don't think that and nobody demanded that. Telegram merely has to comply regionally concerning in this case German users or content shown to them. Tech companies differentiating their products to comply with local laws is common practice.
European (and for that matter, Canadian[1]) courts wanting stuff gone internationally is well-documented[2]. It is not unconceivable that German enforcement agencies would use similar tactics. Once you give them the small finger, they will take the whole arm.