If I correctly understand, you used NX command "Teach Feature Mapping" and now you want to inspect the resulting rules in the MKE.
The resulting mapping rules are stored in the configured machining knowledge xml file.
If you do not see these rules in the MKE, you must have opened an other xml file, not the one configured in NX.
the thing is, that the created customization classes which belongs to the mapping rule are there even my created operations sets. Just the mapping rules are disabled. So I am pretty sure that it is the same xml file.
In NX when i teach feature mapping i can see the mapping rule which is disabled in MKE, that is how i am editing it.
Sometimes when i create the mapping rule they are saved and sometimes not...