No, Ukraine is a different commitment than Taiwan even though the broad-stroke aggression is widely similar. The imperative to defend Taiwan is a half-century old commitment; breaking it would mean forfeiting the first island chain, repealing the Taiwan Relations Act and rethinking the entirety of our modern anti-China warfare strategy. Republicans do not want to break this; they are simply butthurt about the economics of defending Taiwan and want Taiwan to pay for it like they tried footing the bill for the Mexico wall to Mexico. Unfortunately, Taiwan already legally owns all of their American military equipment and the US quite literally cannot take it away from them except by force.
Ukraine is not even remotely similar. It's strategic value is entirely symbolic to the US, and while defending them is a morally righteous cause, the importance of this battle to American homeland security is effectively nothing. If Russia launches a new front in Ukraine, the president's morning brief gets a new paragraph at the bottom. If China threatens Taiwan, America borders on national emergency. It's really that simple - I'm shocked that HN is so willingly duped into being a mouthpiece for sensationalist politics.