In mssql 2019 where sqlcmd utility is?
I have MSSQL 2019 installation at my PC and could figure out the path. You can find this tool in the below directory:
C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn

You may also download it fresh from below links:
https://go.microsoft.com/fwlink/?linkid=2142258
https://go.microsoft.com/fwlink/?linkid=2142257
Same is documented here on MS site.
Hope this helps.