Hi @olliefielding ! By default, the built-in

<PatientTimeline>

component pulls related

Communication

,

Device

,

DeviceRequest

,

DiagnosticReport

,

Media

, and

ServiceRequest

resources. That list can be modified or extended. You can see how it works here: https://github.com/medplum/medplum/blob/main/packages/react/src/PatientTimeline/PatientTimeline.tsx