@ananya12 ,
If the evar is set as conversion syntax, you would have to make sure all the below mentioned actions are happening on the same hit:
- The merchandising eVar is set with a value.
- The products variable is defined with a value.
- A binding event is set.
Once all these actions are there in the same hit, Instance will be counted for the evar value otherwise it will go under None/Unspecified.