You can tell someone is American when they call milky flour “gravy”
This is “gravy” in the same way American squirt cheese is “cheese” in that certain people will call it that. But its categorically a completely different thing.
It’s a bechamel, friend. You are fool who doesn’t understand food. You probably boil everything you don’t microwave.
White gravy, often flavored with chicken stock and herbs, sometimes pepper, is particularly popular in the south, and it slaps. Its the same kind of gravy you might have with biscuits and gravy (these ‘biscuits’ being closer to scones than hard shortbread or tea biscuits) To use a brown gravy in the same scenario would be a travesty, thats mainly reserved for roasted red meats.