https://www.heise.de/en/news/5-years-of-updates-Which-smartp...
"Operating system updates: From the date of end of placement on the market to at least 5 years after that date, manufacturers, importers, or authorised representatives shall, if they provide security updates, corrective updates, or functionality updates to an operating system, make such updates available at no cost for all units of a product model with the same operating system."