What version(s) of the ODBC Driver for SQL Server have you installed?

If ODBC driver 18 that would explain what you are seeing.

The DataFlex SQL Server driver that comes with DataFlex 20.0/20.1 only recognizes up to ODBC Driver 17 for SQL Server.
If you have only ODBC Driver 18 installed it will drop back to the old SQL Server client. (But you should get a warning about minimum client version.)

This table shows the highest recognized ODBC client drivers per DataFlex SQL Driver:
Code:
                                 Highest recognized
DataFlex SQL Drivers 6.3         ODBC Driver 17 for SQL Server
DataFlex SQL Drivers 20.0/20.1   ODBC Driver 17 for SQL Server
DataFlex SQL Drivers 23.0        ODBC Driver 18 for SQL Server
DataFlex SQL Drivers 24.0        ODBC Driver 18 for SQL Server