Or you could just buy from any EU country:
https://www.european-enamel-association.eu/certification.htm...
> 4.8 Specification and determination of the release of toxic elements
> The specification and determination of the release of toxic elements must comply with the requirements specified in the national laws of the country.
Most of the other requirements are about the mechanical properties of the enamel.
There's also this:
> 4.32 Determination and control of Lead and Cadmium release for hot water tanks
But that doesn't apply to cookware.
There's nothing here about requirements for the composition of the enamel or the making public thereof. And what constitutes a "toxic element" (and presumably the dosage) is left to the laws of each country. Most of these countries would consider stainless steel to meet their leeching requirements as well. So we're back to square one. There's no way to tell what the enamel is leeching. You just have an assurance that it's considered safe.
Nevertheless, most glazes have a much more complex composition than the standard borosilicate or soda-lime glasses.
Glazes usually contain colorants and various additives that improve certain properties useful during manufacturing, which do not exist in the glasses used for vessels.
It is possible to make glazes that are perfectly safe for food contact, but historically there were many examples of glazes with harmful components.
Unless a manufacturer provides the composition of the glaze used by them, you cannot know how safe it is.
Moreover, glazes and enamels have a problem that does not exist for stainless steel vessels. The glazes or enamels may crack and expose the base material to the food. However that is somewhat mitigated by their lower price, which facilitates the replacement of the cookware.