We’ve had an unusual spring here in the southeast, pollen went wild as did just about every blooming thing, it was copious. I’ve never seen hollies bloom like that. The insects noticed, too. The hollies on the corners of my house had an audible hum from a distance. Honeybees, I checked. If there is or was a problem here, it’s no longer evident.
Same here in Alabama! I too had a buzzing Holly. I have a 40 foot holly tree that was audibly covered in honey bees. Never saw (or heard!) so many bees in one place out of a hive.
“...pollen went wild as did just about every blooming thing, it was copious. “
Saw the same in SC. Lime-colored pollen covered cars. The air was thick with insects, including lots of fat honeybees.