[SUPPORT] How to write mor table with avro file through spark

I write the mor table through spark, and the default generated files are parquet files.
I would like to know if there is any configuration to make spark write mor table with avor file？

The issue mentions writing a Hudi MOR table through Spark with Parquet output and asks about Avro configuration, but names no files or tests. Start by checking Hudi's Spark write options and MOR table format documentation; done would be a confirmed configuration or a clearly documented limitation.

Written by the indexing model from the issue text.