Share Focus Status Greyed Out - Finally Solved
I tried restarting my phone, toggling the focus status and icloud drive on and off, everything that was being suggested online, but nothing helped. I went to the settings on my MacBook, and saw that the toggle was off for messages in the focus status, and now i can enable and disable sharing for individual contacts in my messages. So if nothing helped you, I would suggest checking your other apple devices!
On MacBook: Settings > Privacy and Security > Focus > Toggle on messages
iPhone 12 Pro, iOS 16