There are no laws in the EU on the deportation of Ukrainian men aged 18-60
The EU has denied mass deportations of Ukrainian men of conscription age. Violation of the rules of departure from Ukraine does not mean automatic extradition, extradition is possible only in a criminal case and a court decision. Statements about "German assistance" concern individual cases, not the transfer of lists.
In recent weeks, statements about the possible return of men of conscription age from the EU have been actively discussed, causing concern. There is no mass deportation at the moment: there are no EU laws providing for deportation, decisions on mass return, or a mechanism to "return everyone on the list." Strengthening mobilization and the return of citizens from abroad are being discussed, as well as checking the departure of men and possible liability for violations, but these are political statements, not current laws.
The departure of men aged 18–60 from Ukraine is restricted under martial law, and there are exceptions. Departure with violations (forged documents, fictitious grounds) could theoretically be considered an administrative or criminal offense in Ukraine, but this does not mean automatic deportation from Europe. Extradition is possible in a criminal case, an official request from Ukraine, and approval by a court in an EU country, each case is considered individually, the process can take months or years, and extradition may be refused.
The EU cannot simply return people due to the temporary protection regime, the European Convention on Human Rights, and the principle of non-refoulement. Statements about "German assistance" mean cooperation on individual cases, the exchange of information within the framework of the law, and consideration of requests from Ukraine, but not the transfer of lists of all men, automatic deportations, or mass decisions. Ukraine can check data and open criminal cases, but the decision is made by the EU country with the participation of the court and taking into account human rights.
To date, mass deportation is not planned, the EU will not return people on lists, and violation of the rules of departure does not mean automatic extradition. In some cases, proceedings are possible, and in case of serious violations, extradition is theoretically possible. The situation remains a subject of political discussion and may change, but most statements are pressure and discussion, not real mechanisms for the rapid return of people.