Which DSE version is compatible to import Cassandra 4.x SSTables?

Is there any DSE 6.x version supporting C* 4.x sstable format (-nb-)? I want to load data from apache C* 4.x using sstableloader into DSE 6.x. What would be the best recommended upgrade path (compatible) to import C* 4.x sstables into DSE 6.x? - DSE 6.x - protocol DSE_V2 - (sstable format -bb-) - C* 4.x - protocol v5 - (sstable format -nb-) Using Apache Cassandra 4.x sstableloader -> The client is unable to negotiate a protocol even after adding application.conf (v4) in EXTRA_CLASSPATH as per doc . Error remains same irrespective of any provided compatible driver:

com.datastax.driver.core.exceptions.UnsupportedProtocolVersionException: \
  [/10.x.x.x:9042] Host does not support protocol version V6 but V5.

Using DSE 6.8.x sstableloader -> Import of -nb- sstables from 4.x complete without errors but there are no files in /data path of DSE cluster and SELECT * from TABLE returns 0 rows. Using nodetool refresh and nodetool import doesn't seem to help. There is no clear information of C* 4.x compatibility with DSE on Datastax documentation. Any links or information around this would be helpful. Thanks!