Isn’t this a requirement of the GPL license? Or am I mistaken?
[1] I'm not entirely sure which clause I picked this up from (it's been a few years), but this clause I can right now seems to say the same thing: Our General Public Licenses are designed to make sure that [...] you receive source code or can get it if you want it [...]
(BMW is another big company which, afaik, has done even better with their compliance efforts: https://www.theregister.co.uk/2016/03/30/bmw_complies_with_g...)