Hi Erica! You are right...any objects with hover states when grouped will all appear when hovered over the group. One idea to keep your fly-in animation and hover options would be to:
-Duplicate the grouped objects (This is a good time to also make sure both groups align-center/middle. You can use the hide icon to make edits to each group)
-Remove the hover states from all the objects in the original group that flies in
-Ungroup the duplicated group (keep the hover states and make sure there are no entrance animations associated with any of the objects)
-Adjust the timeline so after the grouped objects fly in, have the duplicated objects (that are now ungrouped) appear at the exact time the grouped version ends so it looks seamless.
Now learners will be able to hover over the objects. I hope that helps!