Yes, frozen pineapple.Thanks.
Fruits, frozen or canned - from cRc Kosher App
Fruits, frozen or cannedCanned, jarred and frozen fruit are acceptable without certification if (a) they only contain fruit, sugar, ascorbic acid, and/or citric acid, and (b) are not from Israel or China. Accordingly, those which contain flavors, colors, carmine, fruit juice, grape juice, or other sensitive additives, must bear a reliable kosher certification. Canned olives are an exception. See Olives. Frozen raspberries, blackberries, and mulberries can only be used if pureed.