How to do this

[Jörgen]

Hi,

just found this picture on the Internet.

I wonder how that Data (time, km, speed etc.) comes into the Waypoint?

Was it a Track with this data converted into a route, or how? It must be a recorded track.

[Brian McG]

@Jörgen I am guessing that this has has been manually entered as the name for the waypoint via the "T" button/icon

[Jörgen]

No, I don't think so. It is embedded in the GPX data.
GPX files can contain additional information.

*In addition to these main components, GPX files may contain other data embedded in the XML structures:

Time: Timestamps for waypoints and track points indicating the time of recording. This is particularly useful for analysing speed or progress.

Elevation: The exact altitude above sea level for each point.

Speed and heart rate: Certain GPX extensions can store data such as speed, heart rate or cadence recorded by fitness devices or smartwatches.

Name and description: Descriptions or names for waypoints, routes and tracks, which enable better organisation and identification.

Links: References to external websites or files that provide further information about the route or waypoints.*