This study is testing a new medicine that might help treat people with type 2 diabetes. The study is conducted to see if the new medicine can lower high sugar levels in the blood. The purpose of the study is to see if the new study medicine is safe and how well is tolerated by the body. There will be two groups of partici-pants in this study: healthy participants and participants with type 2 diabetes. Participant will either get study medicine (NNC9733-0001) or placebo (a treatment that has no active medicine in it). Which treatment the participant gets is decided by chance. Which dose (strength) the participant get is determined by when participant enter the study. Participant will get one dose which will be injected into the area around abdomen (belly) by the medical staff. The number of injections (up to 4 injections) will depend on the group the participant is assigned to. Larger doses require multiple injections. The study will last for about 40 weeks (10 months).