Seems dire but hardly a supply chain disrupting attack. Stryker is a huge supplier but it not as if this will debilitate the medical supply chain completely. Seems like the hackers found a door they could kick open easily and then justified the action ex-post.
My understanding is that the aim was not to disrupt the supply chain but to harm the company itself.
If they're a primary regional supplier, it could have a huge impact. It doesn't have to break the entire country to matter.