Blackmail, formally extortion or coercion is a crime only when specific kinds of threats (which may vary by jurisdiction) are used to compel someone's behavior.

Threatening to stop offering certain products or services in jurisdictions with unfavorable regulatory environments doesn't meet those criteria in any jurisdiction I'm aware of. European car companies often have models that can't profitably be brought into compliance with USA regulations, and they're just not sold in the USA.

Apple can almost certainly comply with EU regulations while remaining profitable in that market; they're just making a fuss because they don't like the regulations and they hope to get the public on their side.