Q.magnolia blooms
When magnolias bloom in spring, do the older green leaves sag slightly? If not, what does this mean? The blooms are fine, but the growth in prior years drop, still on branch but sagging compared to new spring growth. Is this correct?

This is completely normal. The older leaves on evergreen magnolias will droop when new leaves emerge.
For more information on the care of magnolias, please visit the following link:
https://www.gardeningknowhow.com/ornamental/trees/magnolia/magnolia-tree-care.htm