I honestly don't know how you can think Volt would support Trump's illegal invasion of anything. Let me break it down piece by piece.
You call Volt centrist, others call it radical. Volt may not be a traditional socialist or liberal party, but they are definitely not centrist on:
opposing fascism
regulating big tech, big agri and big oil
universal basic income
making innovative startups succeed in Europe
any progressive/conservative issues really
making Europe strong and independent
Volt oppose the current increase in military spending, instead wanting a single big European Army instead of 27 small ones. Overall military spending in Europe was already OK, the reason we are not as strong as the US militarily is because 27 small armies are not the same as one big army.
I don't know what your opinion on these topics is, but it seems evident to me that in order to stand up against the USA, Russia and China, we need to have a military deterrent. If you consider that, or supporting Ukraine, militaristic, then I don't mind you calling me militaristic.
Volt has always opposed fascism in all its forms. AfD, Netanyahu, Trump, US Big Tech influence in Europe, etc. They will never support Trump illegally invading a sovereign country.