There is a difference between task definition and container. Your screenshot is showing the Task Definition. Inspect the Task Definition, on the first tab there will be Containers section that will give you the Container name and its image. To double check, validate the JSON tab, look for something like

{
    "taskDefinitionArn": "arn:aws:ecs:eu-west-2:1234567890123:task-definition/todo-ecr-container:1",
    "containerDefinitions": [
        {
            "name": "todo-ecr-container",
            "image": "1234567890123.dkr.ecr.eu-west-2.amazonaws.com/todo-ecr-container:latest",
            "cpu": 128,
            "memory": 160,
...