How to completely Logout of Facebook SDK Auth in iOS App

using FBSDKCoreKit 4.22.1

I have an app installed publicly, servicing multiple users during the day. A person can walk up to the iPad and login with their Facebook account:

After successful login, than can do their work and use the app and than they will logout some time later:

The Logout happens successfully. Then the next user comes up to use the public iPad and clicks the Facebook Login button, yet they will see:

The FBSDKLoginManager or other Facebook SDK Libs has remembered some elements of the previous user's Facebook login.

I want to completely clear out any information about the previous user's Facebook credentials

After successful Logout, this FBSDKLoginButtonDelegate method is called and I have tried the following to completely remove the Facebook account info with no success:

func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) {
    print("\(#function) in \(#file.components(separatedBy: "/").last ?? "")")
    print("Todo, must completely remove Facebook Auth token info for current user logging out")
    FBSDKAccessToken.setCurrent(nil)
    FBSDKLoginManager().logOut()
    FBSDKProfile.setCurrent(nil)
}

So with FBSDKCoreKit 4.22.1 Safari browser is used to open the Facebook authentication redirect URL and that Javascript uses local storage:

Interestingly, Blocking all Cookies, which Apple implies will also block Website Data (localStorage), does NOT block local storage and Facebook and still create Web Site data stores:

Apple says here:

"Change which cookies and website data are accepted: Select a “Cookies and website data” option:"

• "Always block: Safari doesn’t let any websites, third parties, or advertisers store cookies and other data on your Mac. This may prevent some websites from working properly."

And that is where I expect Local Storage to be blocked as well as cookies but Facebook can still create local storage entries