Yes — green beans are safe raw or cooked and a parrot favorite, with the pod making good foraging. (Unlike dry beans, these need no cooking.)
Keeper's noteFresh raw beans are great foraging — birds love unzipping the pods. Frozen-thawed work too; skip canned (salt).
Why green beans is good for parrots
Green beans (string beans) are eaten whole as a vegetable, not as a dried legume, so they don't carry the hemagglutinin concern of raw dry beans — they're safe raw or cooked. They bring fiber, vitamins, and a fun pod to split open for the little beans inside.
How to serve it
Fresh raw or lightly steamed; whole pods for foraging.
Frozen-thawed are fine; avoid canned (salted) beans.