windows 11 powershell command to check model number and serial number of computer

For model number 

Get-CimInstance -ClassName Win32_ComputerSystem | Select-Object Model

For serial number 

the Win32_ComputerSystem class does not contain a property named Serial.

To obtain the serial number, you should use the Win32_BIOS class instead

Get-CimInstance Win32_BIOS | Select-Object SerialNumber