This study is testing a medicine called CagriSema to see if it helps kids and teens with Type 2 Diabetes (T2D) lower their blood sugar and weight. T2D is a condition where the body doesn't use insulin properly, leading to high sugar levels in the blood. The study lasts about 1 year and 3 months and has two parts. In the first part, participants are randomly given either CagriSema or a placebo, which looks like the medicine but has no active ingredients. In the second part, everyone gets CagriSema. Participants must be aged 10 to below 18 and should have been diagnosed with T2D at least 30 days before joining. They should also weigh at least 45 kg and have a certain level of blood sugar (measured as HbA1c between 6.5% and 11%).

• The study lasts for about 1 year and 3 months.
• Participants will get either CagriSema or a placebo in the first part.
• All participants receive CagriSema in the second part of the study.