If you are using Structured 3.2 on a device with iOS 17, you can interact with your home screen and lock screen widgets. This means that you can check off tasks (and subtasks) from your timeline or inbox without having to open the app. Simply tap on the checkmark next to a task on your widget to complete it. Note that this only works for the larger widgets, as on smaller widgets the check mark is not displayed. Here, tapping the tittle of the task will toggle the task. Tapping on the icon will still open it in the app.
If you are eager to learn more about the Structured widgets, check out: Home screen widgets & Lock screen widgets.