That doesn't sound relevant to zero click.

That's an oddly specific search and even Google doesn't have any kind of tools for queries like that. What is more likely is that you'll find companies specialized in selling cabinets and they'll have a browser/search to restrict choice by given dimensions. There is not a lot of benefits for them to expose all that data to various search engine, best case scenario they end up competing with a bunch of other brands on a generic search engine page where they have absolutely no control how things are presented etc...

And even before thinking about that, you can actually put the dimensions in a description, which some do (like Ikea) and Google is definitely able to pick up on that, no RDFa was ever needed. As far as I can tell, LLMs can work that out just fine as well.

The problem with the metadata discussion is that if they are actually useful, there is no reason that they are not useful to humans as well, so instead of trying to make the human work for the machine it is much better to make the machine understand humans.

It would be good to know why it was never a good business model.