Originally posted by @azure-pipelines in #32362 (comment)

with /azp list you can get the list of the available pipeline, but if you try to trigger them you will see:
Azure Pipelines could not run because the pipeline triggers exclude this branch/path.
because they have that setting:

So if we want to be able to trigger something with /azp run pipeline name we need to do the workaround from https://github.com/MicrosoftDocs/vsts-docs/issues/4206