More likely they will ban it to protect the Italian heritage of the traditional espresso.

I suppose it's plausible that labelling might be required but what makes you think the EU would ban it?

is there prior art to the EU banning a new technology to protect an old one?

GMO etc is arguable but there’s limits around what you can call some things based around how they are made.

Not really I think, but it’s not uncommon to protect product by restricting production methods or ingredients to traditional ones. So name espresso could be legally restricted to only when it’s brewed in traditional way.

Black bean drink (compare to es×r××so).

Monopoly/duopoly is more a US thing.