My rabbit Solara does that a lot during the day.
They're trying to dig into that floor- and it's natural for rabbits..
(they burrow as you probably know XD)
Here is my suggestion.
Get toys that they only get when they sleep.
And get a piece of apple, carrot, strawberry, some sort of fruit
And give them each one before bed, and give them the toys that are for bed time before as well.
Put a blanket or sheet over the cage at night as well, so they know it's bedtime and they need to sleep.
How much out time/play timedo they get during the day?
More playtime, more sleeping and less noise during the night.
I also give my buns pellets in the morning (I also have a boy and a girl housed together. Theyhave a BIG pen for all day running and playing and a BIG dog cage to sleep in.. Like big enough for me, 5"5 to sit comfortably in there) and I give them their veggies at night, so they can concentrate on eating that throughout the night, and not digging and spazzing out.
My buns used to fight me about getting in the cage at night, but now they run in there when they smell me come in the room, veggies in hand, and they're well behaved and quiet most of the night.