Irrelevant. That was a voluntary intervention, not an invocation of the Treaty's mutual defense aspects. Individual NATO members were not required to participate; three (Czech Republic, Hungary, and Poland) did not.
A similar scenario with Taiwan would not mean "Finland and Sweden would have to send their troops to fight and die there too" as you asserted; they'd have the option to join in if they saw fit.
A similar scenario with Taiwan would not mean "Finland and Sweden would have to send their troops to fight and die there too" as you asserted; they'd have the option to join in if they saw fit.