No. Unless your meatballs are made of ground bacon instead of beef. Pineapple goes well with bacon, and fish, because the sweetness balances the saltiness of the meat. But beef isnt salty like that.

How long it keeps. But as long as it’s not meat or dairy produce, it’ll be a “best before” not a “use by” date, and most stuff is usable long after its best before date. Those crumpets will be fine for at least a week, if you keep them in an airtight container or ziplock bag after opening. After that, they might be a bit stale, but still edible; warm them up nd put a bit of butter on, that’ll soften them up nicely.