I'd also like to mention Sapota.

Honorary mention to Grewia asiatica and Syzygium.

I don't see it mentioned so maybe it's not lesser known, but jackfruit is amazing. SEA like most amazing fruit but have seen it more often in North America. Fresh, not the prepped and sauced vegan style.

Rambutan

Boysenberries

Maypops, which are a north american species of passionfruit. Obviously not a great hand fruit.

Jujubes. They're like a dryer sweeter small apple. They don't need a lot to grow where I am and there's hundreds per tree.

Persimmons. Have a full size tree about to drop maybe 40 pounds of them. And I have no idea what to do with that many.

So not in my area, but I recently discovered cloudberry jam, which is absolutely delicious. It's like a mix of citrus and strawberry.

Loquats! Its like eating a giant sweet grape

Arum is an incredbibly underrated veg too, with an amazing texture.

Marian plum. A bit too sour to eat on it's own but a spiced and preserved ones taste pretty damn good.

fresh figs - they make a tasty snack, and the flavour is mild and pleasant. i can understand some people not enjoying the texture though.