Can you call it pineapple marmalade since is not a citrus fruit?

No, it shouldn't be called pineapple marmalade since marmalade is specifically a citrus fruit preserve.

The term "marmalade" is used to refer to a fruit preserve made with citrus fruits, particularly oranges, lemons, or grapefruits. The rinds of these citrus fruits are included in the preserve, giving it a characteristic texture and flavor.

Pineapple, on the other hand, is a tropical fruit that is not a citrus fruit. While it can be used to make a delicious fruit preserve, it would not be appropriate to call it "marmalade" since that term is reserved for citrus fruit preserves.

Instead, a pineapple preserve would be more accurately referred to as "pineapple jam" or "pineapple spread".