A report out of South Korea has claimed that both Apple and Samsung are preparing to include a blood glucose monitor in their upcoming 2021 smartwatch releases. This means that an Apple Watch 7, Samsung Galaxy Watch 4, or Galaxy Watch Active 3 could end up being fitted with a vital, and non-invasive, sensor for checking glucose levels.
https://www.notebookcheck.net/Apple-Watch-Series-7-Samsung-Galaxy-Watch-4-and-Samsung-Galaxy-Watch-Active-3-could-all-feature-a-non-invasive-glucose-monitor.516887.0.html