ADF - trigger pipe 2 on pipe 1 successful completion

There is no out-of-the-box feature to achieve this, you can share your idea here

What you can do is something as below.

1. On the first schedule based triggered pipeline (pipeline 1), just have a WebActivity at the end which would signal to a custom event created using event hub (send event to custom event grid topic endpoint).

2. Acting on the previous event signal use a Create a custom event trigger to run a pipeline in Azure Data Factory i.e. the pipeline 2

This is really the only current way to do this:

Create a pipeline that executes other pipelines in sequence. Then setup the trigger to run on this one.