Visually see Selection of multiple objects
When selecting multiple objects / assets they highlight (like illustrator).
However in XD if say more than 50 objects are selected via dragging the mouse over the top, it gets to a point and stops the highlighter.
Sangeetha Aswathanarayana commented
I tried to create more than 50 objects in XD and gave it a try on my end and it seems to be working fine.
Can you share your XD file? That might give me more clues on what may be happening.