We have a timeline on a record page and an action button that creates a new record in the timeline (via a Make scenario), unfortunately the timeline doesn’t automatically update with the new record and the user is required to manually refresh the page.
EDIT: We have managed to get the timeline to live update by modifying our Make scenario to set the date in one module and then set the engineer in another module, if these are both set at the same time the timeline doesn’t automatically update for some reason, perhaps some weird quirk to do with the grouping by engineer.