Hello,
Since this is a student Google Workspace account, the YouTube restriction is being controlled by your school’s Google Workspace administrator. I don't think this is a restriction done on the Windows 10 device or your Microsoft account used to sign into Windows.
Unfortunately, no one is able to identify who your school’s administrator is. You will need to contact your school’s IT/help desk, teacher, or school office and ask who manages the school Google Workspace accounts.