I don't think that raising your price because your cost increase is price gouging. Gouging occurs when the price increase do not relate to the cost increase and

I don't think that raising your price because your cost increase is price gouging. Gouging occurs when the price increase do not relate to the cost increase and the difference is being pocketed by the intermediary, here the supermarket. What you describe mainland european supermarket doing is just what happens in a free market. Not price gouging at all.