I mean, that's the very reason why DM/GM screens exist, and why are they demanded product.
DM/GM always should be aware about 'secret checks", and that he should, and when he should make those. And no player can see the result.
Party walk into the room - DM/GM checks what everyone's perception is - and roll perception FOR THEM.
DM doesn't roll for them.
DM just uses the flat passive perception scores they have that don't come from rolls.
Passives aren't supposed to be rolled, the score is just high enough to beat DC or it's not. Rolling is only for actively done things.
