@Albert Albazi, Thanks for posting in Q&A. Based on my researching, I find there's CSP to hide task view for taskbar on windows 11.
Based on my checking, the setting is not in Settings Catalog policy or Administrator Template policy. But we can configure it in custom configuration profile with the following setting and assign the policy to the user group.
https://learn.microsoft.com/en-us/windows/client-management/mdm/policy-csp-start#hidetaskviewbutton
Hope the above information can help.
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