It should go without saying, but it's worth highlighting occasionally that what we habitually frame as "immigration" into one country is inevitably emigration from another, and that the whole issue can only really be solved if you consider the whole system (e.g. Russia could stop invading...
I think it's fair to say that this is a bigger problem for Ukraine and the Ukrainians concerned that it is for the Netherlands or the other countries they have had to go to.