Timeline
A timeline aims to show progress over time. When it comes to Core Web Vitals data, you could connect to the historic CrUX API and visualize it's weekly data (or use our free tool instead to instantly get your website's data).
Within Real User Monitoring, you often get more options and flexibility. RUM solutions often also offers you to compare experiences between two dateranges. This will be convenient when you did a deploy on a certain date.
Timelines in RUMvision
In RUMvision, timelines can be found in the following panels:
Below is a screenshot from a timeline from the technical panel:
RUMvision is allowing users to add annotations. Annotations will help users to instantly compare the before and after situation by clicking on them.