Apple Intelligence Feature Not Available in Meta Apps Like Facebook, Instagram

Apple has seemingly had one of its most useful AI tools blocked from Meta's apps. Writing Tools, which is an Apple Intelligence feature, is not available to use in Facebook, WhatsApp, Instagram, Threads, and Messenger.
Apple's Writing Tools include options to proofread, rewrite, and summarize text almost anywhere you can type in iOS 18. A long press in a text input field usually brings up the feature, but not in any of Meta's apps currently.
Brazilian blog Sorcererhat Tech spotted the lack of Wr