Just have a normal breakfast with some sugary drinks, it helps with baby being active though sometimes they can be sleeping. But always interact with them and tap your baby bump to make them move around esp during scanning. It helps alot for me.
I didn’t specifically eat certain foods before scans thou. I’m not sure if it helps but because KOI was beside my gynae’s clinic so I always drink koi before I go for my scans, all good. 😂