At 10k signatures, the Government is obliged to provide a response. At 100k signatures, the Government must consider the petition for debate.
The Associate Membership petitions are very important to sign too. This is the UK Government one and this is on change.org.
I know petition-fatigue is a thing, but signing them is quick, it’s easy and it’s worth it. Every signature sends a message. Just imagine the impact of a petition with 16 million signatures on it! And these go straight to parliament. They can’t miss them, and they can’t ignore them.
You can also join the EU Petitions website and support this current petition (registration takes about 5 minutes)