Yes, I was referring specifically to the ones that are produced in Poland. Not kinder eggs that are sold in Costco. Those have a proper hashgacha. I think the ones I’m referring to are called kinder bueno.
Ingredients
Milk Chocolate Covered Wafer With Smooth Milky And Hazelnut Filling
MILK CHOCOLATE 31.5% (SUGAR, COCOA BUTTER, COCOA MASS, SKIMMED MILK POWDER, CONCENTRATED BUTTER, EMULSIFIER: LECITHINS (SOYA), VANILLIN), SUGAR, PALM OIL, WHEAT FLOUR, HAZELNUTS (10.5%), SKIMMED MILK POWDER, MILK POWDER, CHOCOLATE (SUGAR, COCOA MASS, COCOA BUTTER, EMULSIFIER: LECITHINS (SOYA), VANILLIN), FAT-REDUCED COCOA, EMULSIFIER: LECITHINS (SOYA), RAISING AGENTS (SODIUM BICARBONATE, AMMONIUM BICARBONATE), SALT, VANILLIN.
TOTAL MILK CONSTITUENTS: 19.5%
So we know that the wheat flour is less that 31.5% and more than 10.5%.
only the ones with cereal. not the regular ones. The entire bar is less than a kezayis
So if someone has multiple חמץ items of less than a kezayis, that were not sold to a goy, there's no issue with חמץ שעבר עליו הפסח with any of them, even if they add up to many כזיתים?
And 43grams I highly doubt that the entire bar is less than a kezayis (which is a volume measurement, obviously exceeded by the bar).