SR-IOV support for Precision 5810

I have installed Windows Server 2019 on Dell Precision 5810 and it shows that SR-IOV is not supported due to BIOS is not advertizing PCIe ACS (Access Control Services):

Get-VMHost | fl IovSupport, IovSupportReasons

IovSupport : False
IovSupportReasons : {To use SR-IOV on this system, the system BIOS must be updated to allow Windows to control PCI
Express. Contact your system manufacturer for an update., SR-IOV cannot be used on this system as
the PCI Express hardware does not support Access Control Services (ACS) at any root port. Contact
your system vendor for further information.}

I'm wondering how to enable SR-IOV on Dell Precision 5810? On other platforms I usually just need to enable 'SR-IOV Global Enable' option in BIOS to make it work, but this option is not avaliable in the BIOS settings of the 5810 workstation.

Additional information:

1) I have enabled virtualization in the BIOS 'Virtualization Support' settings:
- Virtualization = Enabled
- VT for Direct I/O = Enabled
- Trusted Execution = Disabled

2) I have installed Dell DDJKY X710DA4FH (Intel X710-DA4) Quad 4 Port 10GB PCIe SFP+ Network Adapter into PCIe 3.0 x16 slot 4 (connects directly to CPU) and enabled SR-IOV support in the card's BIOS POST configuration utility.

3) The 5810 workstation uses Intel Xeon 2696 v4 CPU, which has support for SR-IOV for all CPU-attached PCIe Root ports.

4) The latest BIOS (A33) is installed on the workstation.