Okay so I had to look in to it because the site is not really doing a good job explaining it at all. Turns out[0] that they are voting for the extension of the temporary regulation thats been in effect since 2021 (Regulation (EU) 2021/1232). So this is about the "voluntary scanning of private communications" (which is still bad, but has been in effect for almost 5 years already).

[0]: https://www.europarl.europa.eu/sedcms/documents/PRIORITY_INF...

Here is the regulation that will be voted on: https://oeil.europarl.europa.eu/oeil/en/procedure-file?refer...

Note that the amendment was already amended on 11th March to set expiry to Aug 2027 and to also exclude E2E communications.