FlatList will only load content when its seeable, if you want to have it preloaded use a ScrollView instead.

you may want to look at this, these doc contains every thing to do to avoid blanc screen while scrolling a flatlist :

https://reactnative.dev/docs/optimizing-flatlist-configuration

I would advise "windowSize" props :

Bigger windowSize will result in less chance of seeing blank space while scrolling. On the other hand, smaller windowSize will result in fewer items mounted simultaneously, saving memory.