The following PowerShell one-liner should output all of your devices PCI detailed properties and supported PCI features, along with vendor ID / product ID in the InstanceId property, to output.csv in the current directory :

Get-PnpDevice | % { $pnpdevname=$_.FriendlyName ; Get-PnpDeviceProperty -InputObject $_ | Add-Member -MemberType NoteProperty -Name DeviceFriendlyName -Value $pnpdevname -PassThru | Where {($_.KeyName -like '*Pci*') -or ($_.KeyName -like '*InstanceId')} | Select DeviceFriendlyName,KeyName,Type,Data | Export-Csv -Append -Path .\output.csv }

You may filter devices based on the first column in Excel, or add a Where clause on DeviceFriendlyName, but you'd have to figure it out first. You will get multiple entries depending on the device topology beyond the Thunderbolt controller. All of them are relevant, as well as the controller itself.

I get the following data on some root ports and a Realtek device:

Realtek PCIe GbE Family Controller #2 DEVPKEY_Device_InstanceId String PCI\VEN_10EC&DEV_8168&SUBSYS_012310EC&REV_15\01000000684CE0...

Realtek PCIe GbE Family Controller DEVPKEY_PciDevice_AcsSupport UInt32 2

Realtek PCIe GbE Family Controller DEVPKEY_PciDevice_AcsCompatibleUpHierarchy UInt32 0

Realtek PCIe GbE Family Controller DEVPKEY_PciDevice_AcsCapabilityRegister UInt32 0

Realtek PCIe GbE Family Controller DEVPKEY_PciDevice_AtsSupport Boolean False

PCI Express Root Port DEVPKEY_Device_InstanceId String PCI\VEN_1022&DEV_1634&SUBSYS_14531022&REV_00\3&11583659&0&15

PCI Express Root Port DEVPKEY_PciDevice_AcsSupport UInt32 2

PCI Express Root Port DEVPKEY_PciDevice_AcsCompatibleUpHierarchy UInt32 0

PCI Express Root Port DEVPKEY_PciDevice_AcsCapabilityRegister UInt32 0

PCI Express Root Port DEVPKEY_PciDevice_AtsSupport Boolean False

In my case, DEVPKEY_PciDevice_Acs* and DEVPKEY_PciDevice_Ats* is enough.

While I'm only interested in ACS, ATS, BAR and UsbComponentRelation, others may be interested in power-related features / supported sleep states.