Because they are complying with Chinese laws regarding data localization in the country and have been known to work with China (recently YMTC chip deal, previously in a major unreported deal that was unearthed a little while ago) in order to get market access.

https://www.reuters.com/article/us-china-apple-icloud-insigh...

https://www.forbes.com/sites/roslynlayton/2022/06/08/silicon...

https://www.theinformation.com/articles/facing-hostile-chine...