2 Cat feeding

So I have 2 cats. D who has been with me for 6 months. And L who i have had for acouple weeks.

I feed them both dry and wet food. Some dry food in the morning and wet food at night.

D has always been a grader when it comes to food. She eats alittle when first offered but comes back hours later to eat more.

L is highly food motivated. Eats like she hasnt eaten in years.

They have dishes set up in separate rooms. But I think L is coming in when Noone is looking and eats the rest of D food. I redirect every time I see it. But she keeps doing it. Any advice?? D isnt exactly a shy girl. She lets L know if she doesn't like something.... so idk what's happening when its coming to food

Any help would be amazing!!