فَاكِهَةٌ as Ism Jins (Generic Noun)
فَاكِهَةٌ
Ism Jins denotes a class or kind, not a single instance. Here, it implies fruit in general — fruit of all kinds.
فِيهِمَا فَاكِهَةٌ وَنَخْلٌ وَرُمَّانٌ
“In them both there are fruit, date-palm trees and pomegranates”.
فَاكِهَةٌ
Ism Jins denotes a class or kind, not a single instance. Here, it implies fruit in general — fruit of all kinds.
From among the fruits, date‑palms and pomegranates are singled out for mention due to their merits and benefits. By virtue of their distinct qualities, they are treated as if they were distinct kinds in their own right.
Examples of what Jannah contains can have a closer connection to the tastes and experiences of those to whom the Message was first sent and who initially embraced Islam.
The use of the undefined (نَكِرَة) form can imply date‑palms and pomegranates of a kind you are not familiar with.