This user has been spreading this falsehood so heavily in this thread that it's almost suspicious.
When you store your FileVault key in iCloud, it is in escrow (ie accessible by Apple) on older but relevant versions of ios and macos. On newer versions, the situation is improved. However, the terminology on newer versions has changed from "icloud keychain", so frankly, I still think you were talking out of your ass.
This user has been spreading this falsehood so heavily in this thread that it's almost suspicious.
When you store your FileVault key in iCloud, it is in escrow (ie accessible by Apple) on older but relevant versions of ios and macos. On newer versions, the situation is improved. However, the terminology on newer versions has changed from "icloud keychain", so frankly, I still think you were talking out of your ass.