Wingflex on the 787 in real life is beyond impressive. You can find pictures on the net if you search for it, especially at high alpha, the wings flex a lot. I believe more than seen in the sim.
The real A320 wings are notoriously rigid, wing flex is barely noticeable. I believe the flex seen in the sim is excessive.
I don’t thing flex is modeled on smaller planes, can’t say about the '47 as I haven’t flown it much.