Hello,
I am not sure if this will work for what you need but it may be similar enough… In the past I have taken a solid that is a very saturated light blue, almost white, and put it on top of the layer I want to “flash”…
Use the “add” transfer mode on the light blue solid.
then you can keyframe the opacity of the solid from 0-100% to “blow out” the highlight areas to white…
maybe that could work for you.