Install-Module Microsoft.Graph

For a specific module:

Install-Module Microsoft.Graph.Identity.SignIns

Update Module

Uninstall-Module Microsoft.Graph

https://learn.microsoft.com/en-us/powershell/microsoftgraph/installation?view=graph-powershell-1.0#updating-the-sdk

Find Module by Command

Find-MgGraphCommand -command "Get-MgUserAuthenticationMethod"

https://learn.microsoft.com/en-us/powershell/microsoftgraph/find-mg-graph-command?view=graph-powershell-1.0#find-microsoft-graph-powershell-commands-by-command-name