The EU let tiny Belarus divert a domestic EU flight and kidnap an EU resident with 0 repercussions. Lithuania is commendable for their actions regarding Taiwan, but the craven EU is unlikely to desire conflict.
https://www.euronews.com/2021/06/04/brussels-bans-belarusian...
Did you want EU to bomb Belarus??
EU reaction over PRC always mixed. EU parliament likes to signal over human rights, EU commission more pragmatic, and so far large EU countries like France, Germany, Italy have been quiet / doesn't appreciate small countries like Lithuania starting shit on behalf of US interests that undermine their interests. Overall clever self-interested play by Lithuania foreign policy.
TLDR for background, PRC downgrading Lithuania diplomatic relationship over opening "Taiwan" instead of "Taipei" representative office (defacto embassy), which contravenes PRC interpretation of One China Policy. Now trade shenanigans of which there isn't much between PRC and Lithuania.
PRC is building indigenous laser for semi anyway, Lithuanian laser was never in the running. Lithuania actually exports more to PRC than vice versa. Entire point of them being first to withdrawal from 17+1 was because PRC underdelivered on east EU trade/investments.
Unlike west EU, Lithuania has little to lose and much more to gain supporting US interests. On the flip side, major EU powers low key do not like idea that small baltic states like Lithuania has this much influence and will act accordingly. There history of transatlantic drama with US using desperate security partners to undermine EU policy in general.