"The data subject must be informed of the grounds for the authorisation as soon as the provision of this information is no longer likely to jeopardise the investigations"
https://curia.europa.eu/jcms/upload/docs/application/pdf/2024-10/cp240171en.pdf
quoting note18te…gtms#ECJ: Access by the police to #PersonalData contained in a mobile telephone is not necessarily limited to the fight against serious crime 👉 https://curia.europa.eu/jcms/jcms/Jo2_7052/