Czech pirate party and German pirate party have seats and they're members of the Greens–European Free Alliance [1]. Take a look at which parties where you live are members of that alliance.
Just don't get guided by the tables with only those Alliance members, who actually made it into the European Parliament, on this page. For instance, only Sylwia Spurek is mentioned there for Poland - a terrible choice IMHO [1], while there's the Pirate Party in Poland (https://polskapartiapiratow.pl/) too.
[1] For example, while being the Vice Commissioner for Human Rights (vice ombudswoman) in Poland, she stated that "It is worth, first of all, stating a few facts. First, violence has a gender, whether we want it to or not. Women and children are the victims, and men are the perpetrators." (video transcript translated with https://www.deepl.com, source in Polish: https://wiadomosci.onet.pl/kraj/dr-sylwia-spurek-przemoc-ma-...).
If I correctly understand the linked materials by Patrick Breyer [1], then the parliament (which is the piece of the E.U. where we are presently asked for our vote), is opposed to this pretty much in its entirety: It says "Parliament has positioned itself almost unanimously against indiscriminate chat control." So, it seems, the way you vote here doesn't much affect that outcome at all.
Also, if I correctly understand this table [2], then "Renew" (formerly "ALDE") is also opposed, so you don't need to adopt the leftist political ideology of the Greens as a package, just to get pro-privacy representation in the European Parliament. "Renew" does seem to be a viable "libertarian" alternative there. They also make some pro-privacy representations on their website. I don't follow European politics much, so I may be mistaken here. For example, I haven't looked into their voting record.
1. https://en.m.wikipedia.org/wiki/Greens%E2%80%93European_Free...