Facebook, WhatsApp, and Instagram block use of Apple Intelligence

All Meta apps for the iPhone have been updated to take out the option to use the Writing Tools in Apple Intelligence.
Writing Tools are not available in Facebook on iOS, nor in any of Meta's other apps.
It's unlikely that Meta will ever reveal the reasons behind its decision — even if it's happy to spill other firms' confidential details — but it is now blocking the use of Writing Tools. It's not clear when the change was made, but at time of writing, Writing Tools are unavailable ac