Hi Florian,
I found some documentation on support for ADLS Gen 2 in comments section, here is the update on support for ADLS Gen 2 and Polybase, looks like connection to ADLS Gen 2 may be supported if the ADLS does not support hierarchical namespace.
Can you please check the comments section in the link below:
https://docs.microsoft.com/en-us/sql/relational-databases/polybase/polybase-configure-azure-blob-storage?view=sql-server-ver15
Hope that helps, let me know for any further questions on this.
Regards,
Sriharsh
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