Inclusion Criteria:
* Must have given written informed consent before any study-related activities are performed and must be able to understand the full nature and purpose of the study, including possible risks and adverse effects.
* Adult males and females, 18 to 75 years of age (inclusive) on the day of signing the informed consent form (ICF).
* Must have a diagnosis of T2DM for at least 6 months before screening based on the disease diagnostic criteria.
* Must have an HbA1c value at screening of ≥7.0% and ≤10.0% (≥53 and ≤86 mmol/mol) and treated with diet and exercise alone or a stable dose of metformin (either immediate release or extended release, ≥1000 mg/day and not more than the locally approved dose) for at least 3 months prior to screening.
* Body mass index (BMI) ≥25 to \<40 kg/m2 at screening.
Exclusion Criteria:
* Have a diagnosis of type 1 diabetes.
* History of severe hypoglycaemia and/or hypoglycaemia unawareness within 6 months prior to screening.
* Have active proliferative diabetic retinopathy or history of uncontrolled and potentially unstable diabetic retinopathy or maculopathy.
* History of or current chronic pancreatitis, or acute pancreatitis within the past 6 months prior to screening.
* Diagnosis of gastroparesis or history of bariatric surgery or a clinically significant gastric emptying abnormality, in the opinion of the investigator (or delegate).
* Have known liver disease or obvious clinical signs or symptoms of liver disease, including acute or chronic hepatitis; or have any of the following at screening: ALT ≥ 3 × ULN, AST ≥ 3 × ULN, and total bilirubin ≥2 × ULN.
* Concomitant therapy in addition to metformin therapy with another oral antihyperglycaemic medication (OAM) including, but not limited to, sulfonylureas, dipeptidyl peptidase-4 (DPP-4) inhibitors, sodium-glucose cotransport 2 inhibitors, alpha-glucosidase inhibitors, and meglitinides. Participants may be randomised if the additional OAM was discontinued at least 3 months prior to screening.
* Have used insulin for diabetic control within the prior year; however, short-term use of insulin for acute conditions is allowed (≤14 days) in certain situations, such as during a hospitalisation or perioperatively.
* Have had any exposure to GLP-1 analogues (including combination products) or other related compounds within the prior 3 months prior to screening, or any history ever of allergies to these medications. Patients who previously took GLP-1 analogues or related compounds and who discontinued those medications for intolerability or lack of efficacy will not be randomised.
* Have been treated with prescription drugs that promote weight loss or similar body weight loss medications including over-the-counter medications within 3 months prior to screening.
