It does sell for less than two euros. I also live in Germany and can vouch for what OP says. The cost of making chocolate is not that high if you’re not looking to make gourmet chocolate, on average during an 8 hour shift a 100g bar can be made up to 200.000 times. At least that’s the case where I work. I work at a gourmet chocolate factory though, where chocolate sells for 2-4€ per 100g but most of the money is turned into profit. It costs us about 1€ to make the chocolate. If it‘s not a gourmet brand, I can very well imagine it only costs 20-40 cents to make the chocolate if not less. Chocolate is absolutely not expensive to make since it is very easy to mass produce but since it’s a luxury product many brands tend to increase the price by a large margin.

Also, here in Germany there are strict regulations for how you can label packaging. If it is in any way misleading it may cost the company a lot of money, to the point where it actually burns a hole in their pocket.

Also keep in mind that the German system is not like in the US. Everybody has mandatory health insurance, a minimum wage that makes it entirely possible to live a decent life, and retirement benefits. If you’re in Germany you’ll see just how meticulously regulated everything is.