Hi Hussein,
Thank you for your response. I found a thread that provides a resolution to the missing "Show Background Effects" option.
"You have just to copy:
desktop-config.json
settings.json
storage.json
You can proceed as follows:
Close MS Teams completely
Copy the above listed files from a machine of someone who has the feature working (%Appdata%\Microsoft\Teams or C:\Users<userid>\AppData\Roaming\Microsoft\Teams)
Paste the copied files in your %AppData%\Microsoft\Teams and replace the existing files
Start MS Teams and wait until you got an error message where you can click on "Sign out"
Log-in with your email address"
https://answers.microsoft.com/en-us/msteams/for...
Hopefully this helps.