Powershell

Get-NetAdapterBinding | Where-Object ComponentID -EQ 'ms_tcpip6'

Disable-NetAdapterBinding -Name 'Ethernet' -ComponentID 'ms_tcpip6'

Registry

Location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\
Name: DisabledComponents
Type: REG_DWORD
Min Value: 0x00 (default value)
Max Value: 0xFF (IPv6 disabled) Decimal 255

New-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\" -Name DisabledComponents -Value 255 -PropertyType DWORD -Force

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references: How to Disable IPv6 on Windows (adamtheautomator.com) Configure IPv6 for advanced users - Windows Server | Microsoft Learn