A Study to Evaluate Eli Lilly's Insulin Dosing Algorithm to Control Glycemia in Insulin-treated Adults With Type 2 Diabetes

Inclusion Criteria: To be eligible for the study, all participants must meet the following criteria: 1. Adult male or female ≥ 18 years of age. 2. Type 2 diabetes mellitus has been clinically diagnosed (the diagnosis of type 2 diabetes is based on the investigator's judgment) for at least 12 months 3. Using multiple daily insulin injections (one basal and ≥ 2 prandial doses) for ≥ 3 months. 4. Using insulin glargine (U100 or U300), detemir, degludec, or NPH. 5. Most recent (in the last 6 month) HbA1c ≤ 10%. 6. Use of a GLP1 agonist or SGLT inhibitor for the past 3 months. Exclusion Criteria: Participants who meet any of the following criteria are not eligible for the study: 1. Severe hypoglycaemic episode ≤ two months before admission. 2. Ongoing pregnancy, or any newly diagnosed pregnancy throughout the study 3. Clinically significant nephropathy, neuropathy or retinopathy as judged by the investigator. 4. Recent (within the past 6 months) acute macrovascular event (e.g. acute coronary syndrome or cardiac surgery). 5. Peripheral vascular disease, foot ulcer, Charcot arthropathy or any condition that limits ability to walk 6. Other serious medical illness likely to interfere with study participation or with the ability to complete the trial by the judgment of the investigator. 7. Use of oral hypoglycaemic agents besides SGLTi's, GLP1 agonists, and or metformin and unwilling to discontinue for the run-in and intervention period.