The IMessage App on my MacBook Pro, Big Sur, 11.7 is not syncing to the cloud. I've searched how to do that from my Mac and the info I read does not work. I tried to sign out of IMessages on my Mac but there is no way to sign out that I could find. I thought if I could sign out and sign back in with my Apple ID it would fix it. There is 'quit' but no sign out. IMessages does not appear in ICloud. Any help will be appreciated.