I’m looking for newsletters, RSS offers and the like to give me a good extract if something happens for iOS devices that companies have to pay attention to. Does anyone know such sources?
There’s actually an RSS feed by Apple about new releases and stuff - Releases - Apple Developer
if you sign up for apple seed (this can be done using an account from Apple Business Manager) you get emails from Apple around iOS releases and beta features that are coming out.
If you want an old school mailing list for OS updates you can sign up to security-announce @ lists.apple.com Mailing Lists
+1 for Apple Seed for IT