Egg contains sugar, very little hence saying added sugar is noticeable in taste.

Zaanse is the best Dutch mayo because it doesn't have that much sugar in it, Calvé for instance has more than double the amount of grams per 100ml.

I see Hellmann's is about the same sugar wise as Zaanse.

As a Belgian I grew up with less sweet mayo, like max half a gram of sugar per 100 grams of mayo. So often mayo from other countries taste too sweet.

What timezone are we talking about? Might be helpful for suggestions.