Generally, I believe Dutch representatives in the EU have been doing their thing when it comes to arguing against encryption, so it probably needn't play a major role in your deliberations.

It might be that a 2021 edition of this website is going to be launched again though, if you want to make sure: https://www.privacystemwijzer.nl/ (And otherwise the 2019 edition might already give you enough of an idea.)

Write to each of the political parties to express your position. At least to the parliamentary parties that you would consider voting for.

The most powerful thing you can do, right now, is make the parties aware that this is important to your vote.

Try to reach a person - contacting individual politicians is best. Although, they should have a staff to deal with your writing and reply directly to your point, especially before the election. You might expect to be added to a spammy mailing list.

Bearing in mind that the national MPs do not have direct power over this within the EU, they should still have a political position.

Vote for a party which supports your position (check also: https://www.kieskompas.nl/nl/tk21/)

Find out which party makes sense to you. In the UK, there are usually "tests" where you answer questions based on what you think, and it'll show you to what percent you agree with which party.

If I'd have to guess, the Pirate Party probably supports encryption.

Given that the current political climate is "lie until you get elected", it doesn't matter. Maybe vote for someone you like personally. Hopefully they have lied about things you can live with.