Okay… I guest that I am not understanding how you want to set up your availability…?
You do want IB, but not on the same day? Then leave IB on, and set the Advanced notice to 1-day, which would fill that requirement, yes? You DO NOT have to allow IB guests to book the same day without advance notice. This is an option that you can turn off by un-checking the box.
The other option is to set a cutoff time for IB - if you want to allow same day IB, but don’t want them after a certain time, i.e. evening or late night bookings.