I can't find a link to a page or snippet that describes these, but they're pretty intuitive, so something like below could be enough?
To provide a link to the user to import a workflow with one click, create a URL with the following format
https://usegalaxy.org.au/workflows/trs_import?trs_server=workflowhub.eu&trs_id=403&trs_version=2
Where 403 is the workflowhub id, which may be found in workflowhub URL: https://workflowhub.eu/workflows/403
Minor suggestion - could there be an example (or link) of how to link a workflowhub workflow to import?
e.g. these links: https://usegalaxy.org.au/workflows/trs_import?trs_server=workflowhub.eu&trs_id=403&trs_version=2
I can't find a link to a page or snippet that describes these, but they're pretty intuitive, so something like below could be enough?