If I google this claim I am mainly getting articles that are widely criticised as being misleading or AI generated. Is there any accurate report on the cosequences of the regulation?

They will block the possibility of installation of custom android versions like lineageos. Expansion of the Delegated act 2022/30

How they will do it I don't know. Bootloader or only accepting some signed roms..

I'm just hoping for a source

Delegated Regulation (EU) 2022/30, supplementing Directive 2014/53/EU. Official Publication: Published in the Official Journal of the European Union (OJ L 7, 12.1.2022, p. 6–8). Link: Available at

Delegated regulation - 2022/30 - EN - EUR-Lex