Well, they can come get bees from my yard, I have loads of them. I had tons of fruit, what killed it this year was the late freeze. My grape vines have recovered well, but no plums or pears this year.
If their bees are “weak”, maybe they need to shore them up with wild bees.
Just a few years ago we were going to be overwhelmed with bees as the african ones interbreed with the locals!! Now this!!!
Oh, I almost forgot: Bush’s fault.