Alternative method using the Marc LaFleur linked example. I couldn't get this to work from with application permissions.

Connect-MgGraph -Scopes "Team.Create" -NoWelcome

$params = @{
    "[email protected]" = "https://graph.microsoft.com/v1.0/teamsTemplates('educationClass')"
    displayName = "My Sample Team"
    description = "My sample team's description"
}

New-MgTeam -BodyParameter $params