Q.Dwarf Magnolia Problems?
My dwarf magnolia tree is FULL of flies and bees this summer. I have lived here for ten years, and I’ve never seen this before. Should I be doing something about it?

Certified GKH Gardening Expert
It can be a natural process as the blooms become more profuse. There is no need to do anything about it, but if you feel like you need to due to the annoyance of so many pests, it won't hurt anything.
These articles will help you with insect control:
https://www.gardeningknowhow.com/special/organic/what-are-organic-pesticides.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides