> IDK if RAM chips are also on that list.

Apple cancelled their deal with YMTC (Chinese RAM company) after the US sanctioned the latter. I don't know whether that is directly because of the sanctions, or indirectly (e.g. if Apple thought sanctions would hamper YMTC's ability to supply the goods), but they have had the same effect.

https://www.lightreading.com/business-management/chinese-chi...

https://www.business-standard.com/article/international/appl...