I'm using the REST API to retrieve Pipeline Events per the documentation:
https://docs.databricks.com/api/workspace/pipelines/listpipelineevents

I am able to retrieve some records but the API stops after a call or two.  I verified the number of rows using the TVF "event_logs", which is over 300 records.  The API consistently returns 34-35 before stopping, furthermore, I used the Databricks SDK to attempt the same thing, however, the results are the same (34-35) records.

https://databricks-sdk-py.readthedocs.io/en/latest/workspace/pipelines/pipelines.html