Yes, the sentence is grammatically correct.
It means that the speaker is inquiring whether a particular feature is new to the Opay platform or application. The phrase "How true is it?" suggests that they are also questioning the accuracy or reliability of the information regarding this new feature.
Possible rephrasing could include:
1. "Is this a new feature in Opay?"
2. "Is this a new feature on Opay?"
3. "How accurate is this


