Hey Saranya,
As Rene said, it is not possible,
The workaround for achieving this, you have to make a generalization/specialization between the two entities,
and after that, in a microflow, you can retrieve both the list and make a union using the list operation.
Hope it helps!
2 lists of 2 different entities? And what is the goal of this merge?
Refer this Screenshot
You are getting this error because CoreRecipeMOG is not a specialization of RecipeMOG.