Which version on vSphere 6.7 are you running? Because the combination of product you have it is only support from 6.7 U1 and above.
Could you also please detail a little bit more your issue?
Sorry, My vSphere is 7.0 , NSX-T is 3.0 , when I upgraded my deep security from 12.5 to 20,
The version not be update on the NSX-T , it is still show version 12.5 like picture 2.
This situation also occurs in NSXV.
Did you try to trigger a resync and populate the credentials again from Deep Security?
Also please check from Service Deployment and click on "View Service Details" to see if it is reflecting the correct version.