I'm not sure if you mean 'unchecked' as in it won't let you check it or what, but if you got a scholarship, you should be able to go into your payment agreement check the scholarship button and then confirm your PA again. So it doesn't automatically check it for you if that's what you're wondering.
If it's just not showing up, then maybe wait a few days no rush
. Just confirm your payment agreement as it is now to complete your registration if you haven't already then add the scholarship later once it appears.