This research study is to test if a new insulin, called insulin icodec, which is taken once a week, helps control blood sugar better than insulin glargine, which is taken daily. Both insulins are used to treat Type 2 Diabetes (T2D). Participants will be randomly assigned to take either insulin icodec or insulin glargine. The new insulin will be given through a small needle injection once a week, while the daily insulin will be injected once a day. Injections can be made in the thigh, upper arm, or stomach. The study will last about nine months, but the insulin treatment is only for six months.

• This study requires nine months of participation.
• Participants will be randomly assigned to a treatment group.
• Injections will be self-administered once a week or daily.