Alternatives might be:
Db2 Ingest Command:
https://www.ibm.com/docs/en/db2/12.1.0?topic=commands-ingest
IBM Data Movement Tool:
https://datageek.blog/2015/01/13/the-ibm-data-movement-tool/
Your own written or any data loader like:
https://dlthub.com/product/dlt
more...?